dlinkedlists.h File Reference

A set of macros to manage doubly-linked lists. More...

#include "asterisk/lock.h"

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Defines

#define AST_DLLIST_APPEND_DLLIST(head, list, field)
 Appends a whole list to the tail of a list.
#define AST_DLLIST_EMPTY(head)   (AST_DLLIST_FIRST(head) == NULL)
 Checks whether the specified list contains any entries.
#define AST_DLLIST_ENTRY(type)   AST_DLLIST_HEAD_NOLOCK(, type)
 Declare previous/forward links inside a list entry.
#define AST_DLLIST_FIRST(head)   ((head)->first)
 Returns the first entry contained in a list.
#define AST_DLLIST_HEAD(name, type)
 Defines a structure to be used to hold a list of specified type.
#define AST_DLLIST_HEAD_DESTROY(head)
 Destroys a list head structure.
#define AST_DLLIST_HEAD_INIT(head)
 Initializes a list head structure.
#define AST_DLLIST_HEAD_INIT_NOLOCK(head)
 Initializes a list head structure.
#define AST_DLLIST_HEAD_INIT_VALUE
 Defines initial values for a declaration of AST_DLLIST_HEAD.
#define AST_DLLIST_HEAD_NOLOCK(name, type)
 Defines a structure to be used to hold a list of specified type (with no lock).
#define AST_DLLIST_HEAD_NOLOCK_INIT_VALUE
 Defines initial values for a declaration of AST_DLLIST_HEAD_NOLOCK.
#define AST_DLLIST_HEAD_NOLOCK_STATIC(name, type)
 Defines a structure to be used to hold a list of specified type, statically initialized.
#define AST_DLLIST_HEAD_SET(head, entry)
 Initializes a list head structure with a specified first entry.
#define AST_DLLIST_HEAD_SET_NOLOCK(head, entry)
 Initializes a list head structure with a specified first entry.
#define AST_DLLIST_HEAD_STATIC(name, type)
 Defines a structure to be used to hold a list of specified type, statically initialized.
#define AST_DLLIST_INSERT_AFTER(head, listelm, elm, field)
 Inserts a list entry after a given entry.
#define AST_DLLIST_INSERT_AFTER_CURRENT(elm, field)
 Inserts a list node after the current node during a traversal.
#define AST_DLLIST_INSERT_BEFORE(head, listelm, elm, field)
 Inserts a list entry before a given entry.
#define AST_DLLIST_INSERT_BEFORE_CURRENT(elm, field)
 Inserts a list node before the current node during a traversal.
#define AST_DLLIST_INSERT_BEFORE_CURRENT_BACKWARDS(elm, field)   AST_DLLIST_INSERT_AFTER_CURRENT(elm, field)
 Inserts a list entry after the current entry during a backwards traversal. Since this is a backwards traversal, this will insert the entry AFTER the current element. Since this is a backwards traveral, though, this would be BEFORE the current entry in traversal order. Confusing?
#define AST_DLLIST_INSERT_HEAD(head, elm, field)
 Inserts a list entry at the head of a list.
#define AST_DLLIST_INSERT_TAIL(head, elm, field)
 Appends a list entry to the tail of a list.
#define AST_DLLIST_IS_MEMBER(head, elm, field)
 Checks whether the specified list contains the element.
#define AST_DLLIST_LAST(head)   ((head)->last)
 Returns the last entry contained in a list.
#define AST_DLLIST_LOCK(head)   ast_mutex_lock(&(head)->lock)
 Locks a list.
#define AST_DLLIST_MOVE_CURRENT(newhead, field)
 Move the current list entry to another list at the tail.
#define AST_DLLIST_MOVE_CURRENT_BACKWARDS(newhead, field)
 Move the current list entry to another list at the head.
#define AST_DLLIST_NEXT(elm, field)   AST_DLLIST_NEXT_DIRECTION(elm, field, first)
 Returns the next entry in the list after the given entry.
#define AST_DLLIST_NEXT_DIRECTION(elm, field, direction)   ((elm)->field.direction)
#define AST_DLLIST_PREV(elm, field)   AST_DLLIST_NEXT_DIRECTION(elm, field, last)
 Returns the previous entry in the list before the given entry.
#define AST_DLLIST_REMOVE(head, elm, field)
 Removes a specific entry from a list.
#define AST_DLLIST_REMOVE_CURRENT(field)
 Removes the current entry from a list during a traversal.
#define AST_DLLIST_REMOVE_HEAD(head, field)
 Removes and returns the head entry from a list.
#define AST_DLLIST_REMOVE_TAIL(head, field)
 Removes and returns the tail node from a list.
#define AST_DLLIST_REMOVE_VERIFY(head, elm, field)
 Removes a specific node from a list if it is in the list.
#define AST_DLLIST_TRAVERSE(head, var, field)   AST_DLLIST_TRAVERSE_DIRECTION(head, var, field, first)
 Loops over (traverses) the entries in a list.
#define AST_DLLIST_TRAVERSE_BACKWARDS(head, var, field)   AST_DLLIST_TRAVERSE_DIRECTION(head, var, field, last)
 Loops over (traverses) the entries in a list in reverse order, starting at the end.
#define AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN(head, var, field)   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(head, var, field, last)
 Loops safely over (traverses) the entries in a list.
#define AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END
 Closes a safe loop traversal block.
#define AST_DLLIST_TRAVERSE_DIRECTION(head, var, field, start)   for ((var) = (head)->start; (var); (var) = AST_DLLIST_NEXT_DIRECTION(var, field, start))
 Traverse a doublly linked list using the specified direction list.
#define AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(head, var, field, start)
 Safe traversal of a doublly linked list using the specified direction list.
#define AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END   } while (0)
#define AST_DLLIST_TRAVERSE_SAFE_BEGIN(head, var, field)   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(head, var, field, first)
 Loops safely over (traverses) the entries in a list.
#define AST_DLLIST_TRAVERSE_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END
 Closes a safe loop traversal block.
#define AST_DLLIST_TRYLOCK(head)   ast_mutex_trylock(&(head)->lock)
 Locks a list, without blocking if the list is locked.
#define AST_DLLIST_UNLOCK(head)   ast_mutex_unlock(&(head)->lock)
 Attempts to unlock a list.
#define AST_RWDLLIST_APPEND_DLLIST   AST_DLLIST_APPEND_DLLIST
#define AST_RWDLLIST_EMPTY   AST_DLLIST_EMPTY
#define AST_RWDLLIST_ENTRY   AST_DLLIST_ENTRY
#define AST_RWDLLIST_FIRST   AST_DLLIST_FIRST
#define AST_RWDLLIST_HEAD(name, type)
 Defines a structure to be used to hold a read/write list of specified type.
#define AST_RWDLLIST_HEAD_DESTROY(head)
 Destroys an rwlist head structure.
#define AST_RWDLLIST_HEAD_INIT(head)
 Initializes an rwlist head structure.
#define AST_RWDLLIST_HEAD_INIT_VALUE
 Defines initial values for a declaration of AST_RWDLLIST_HEAD.
#define AST_RWDLLIST_HEAD_SET(head, entry)
 Initializes an rwlist head structure with a specified first entry.
#define AST_RWDLLIST_HEAD_STATIC(name, type)
 Defines a structure to be used to hold a read/write list of specified type, statically initialized.
#define AST_RWDLLIST_INSERT_AFTER   AST_DLLIST_INSERT_AFTER
#define AST_RWDLLIST_INSERT_AFTER_CURRENT   AST_DLLIST_INSERT_AFTER_CURRENT
#define AST_RWDLLIST_INSERT_BEFORE   AST_DLLIST_INSERT_BEFORE
#define AST_RWDLLIST_INSERT_BEFORE_CURRENT   AST_DLLIST_INSERT_BEFORE_CURRENT
#define AST_RWDLLIST_INSERT_BEFORE_CURRENT_BACKWARDS   AST_DLLIST_INSERT_BEFORE_CURRENT_BACKWARDS
#define AST_RWDLLIST_INSERT_HEAD   AST_DLLIST_INSERT_HEAD
#define AST_RWDLLIST_INSERT_TAIL   AST_DLLIST_INSERT_TAIL
#define AST_RWDLLIST_IS_MEMBER   AST_DLLIST_IS_MEMBER
#define AST_RWDLLIST_LAST   AST_DLLIST_LAST
#define AST_RWDLLIST_MOVE_CURRENT   AST_DLLIST_MOVE_CURRENT
#define AST_RWDLLIST_MOVE_CURRENT_BACKWARDS   AST_DLLIST_MOVE_CURRENT_BACKWARDS
#define AST_RWDLLIST_NEXT   AST_DLLIST_NEXT
#define AST_RWDLLIST_NEXT_DIRECTION   AST_DLLIST_NEXT_DIRECTION
#define AST_RWDLLIST_PREV   AST_DLLIST_PREV
#define AST_RWDLLIST_RDLOCK(head)   ast_rwlock_rdlock(&(head)->lock)
 Read locks a list.
#define AST_RWDLLIST_REMOVE   AST_DLLIST_REMOVE
#define AST_RWDLLIST_REMOVE_CURRENT   AST_DLLIST_REMOVE_CURRENT
#define AST_RWDLLIST_REMOVE_HEAD   AST_DLLIST_REMOVE_HEAD
#define AST_RWDLLIST_REMOVE_TAIL   AST_DLLIST_REMOVE_TAIL
#define AST_RWDLLIST_REMOVE_VERIFY   AST_DLLIST_REMOVE_VERIFY
#define AST_RWDLLIST_TRAVERSE   AST_DLLIST_TRAVERSE
#define AST_RWDLLIST_TRAVERSE_BACKWARDS   AST_DLLIST_TRAVERSE_BACKWARDS
#define AST_RWDLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN   AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN
#define AST_RWDLLIST_TRAVERSE_BACKWARDS_SAFE_END   AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_END
#define AST_RWDLLIST_TRAVERSE_DIRECTION   AST_DLLIST_TRAVERSE_DIRECTION
#define AST_RWDLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN
#define AST_RWDLLIST_TRAVERSE_DIRECTION_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END
#define AST_RWDLLIST_TRAVERSE_SAFE_BEGIN   AST_DLLIST_TRAVERSE_SAFE_BEGIN
#define AST_RWDLLIST_TRAVERSE_SAFE_END   AST_DLLIST_TRAVERSE_SAFE_END
#define AST_RWDLLIST_TRYRDLOCK(head)   ast_rwlock_tryrdlock(&(head)->lock)
 Read locks a list, without blocking if the list is locked.
#define AST_RWDLLIST_TRYWRLOCK(head)   ast_rwlock_trywrlock(&(head)->lock)
 Write locks a list, without blocking if the list is locked.
#define AST_RWDLLIST_UNLOCK(head)   ast_rwlock_unlock(&(head)->lock)
 Attempts to unlock a read/write based list.
#define AST_RWDLLIST_WRLOCK(head)   ast_rwlock_wrlock(&(head)->lock)
 Write locks a list.


Detailed Description

A set of macros to manage doubly-linked lists.

Definition in file dlinkedlists.h.


Define Documentation

#define AST_DLLIST_APPEND_DLLIST ( head,
list,
field   ) 

Appends a whole list to the tail of a list.

Parameters:
head This is a pointer to the list head structure
list This is a pointer to the list to be appended.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Note: The source list (the list parameter) will be empty after calling this macro (the list entries are moved to the target list).
Since:
1.6.1

Definition at line 1115 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE().

#define AST_DLLIST_EMPTY ( head   )     (AST_DLLIST_FIRST(head) == NULL)

Checks whether the specified list contains any entries.

Parameters:
head This is a pointer to the list head structure
Returns:
non-zero if the list has entries

zero if not.

Since:
1.6.1

Definition at line 468 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), and hash_ao2_destroy().

#define AST_DLLIST_ENTRY ( type   )     AST_DLLIST_HEAD_NOLOCK(, type)

Declare previous/forward links inside a list entry.

Parameters:
type This is the type of each list entry.
This macro declares a structure to be used to doubly link list entries together. It must be used inside the definition of the structure named in type, as follows:

 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }

The field name list here is arbitrary, and can be anything you wish.

Since:
1.6.1

Definition at line 412 of file dlinkedlists.h.

#define AST_DLLIST_FIRST ( head   )     ((head)->first)

Returns the first entry contained in a list.

Parameters:
head This is a pointer to the list head structure
Since:
1.6.1

Definition at line 421 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), hash_ao2_find_first(), hash_ao2_find_next(), hash_ao2_iterator_next(), and print_list_backwards().

#define AST_DLLIST_HEAD ( name,
type   ) 

Value:

struct name {                          \
      struct type *first;                    \
      struct type *last;                     \
      ast_mutex_t lock;                   \
   }
Defines a structure to be used to hold a list of specified type.

Parameters:
name This will be the name of the defined structure.
type This is the type of each list entry.
This macro creates a structure definition that can be used to hold a list of the entries of type type. It does not actually declare (allocate) a structure; to do that, either follow this macro with the desired name of the instance you wish to declare, or use the specified name to declare instances elsewhere.

Example usage:

 static AST_DLLIST_HEAD(entry_list, entry) entries;

This would define struct entry_list, and declare an instance of it named entries, all intended to hold a list of type struct entry.

Since:
1.6.1

Definition at line 157 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_DESTROY ( head   ) 

Value:

{                             \
      (head)->first = NULL;            \
      (head)->last = NULL;          \
      ast_mutex_destroy(&(head)->lock);   \
   }
Destroys a list head structure.

Parameters:
head This is a pointer to the list head structure
This macro destroys a list head structure by setting the head entry to NULL (empty list) and destroying the embedded lock. It does not free the structure from memory.
Since:
1.6.1

Definition at line 963 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_INIT ( head   ) 

Value:

{                             \
      (head)->first = NULL;            \
      (head)->last = NULL;          \
      ast_mutex_init(&(head)->lock);      \
   }
Initializes a list head structure.

Parameters:
head This is a pointer to the list head structure
This macro initializes a list head structure by setting the head entry to NULL (empty list) and recreating the embedded lock.
Since:
1.6.1

Definition at line 932 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_INIT_NOLOCK ( head   ) 

Value:

{                             \
      (head)->first = NULL;            \
      (head)->last = NULL;          \
   }
Initializes a list head structure.

Parameters:
head This is a pointer to the list head structure
This macro initializes a list head structure by setting the head entry to NULL (empty list). There is no embedded lock handling with this macro.
Since:
1.6.1

Definition at line 995 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_INIT_VALUE

Value:

{                                   \
      .first = NULL,                      \
      .last = NULL,                       \
      .lock = AST_MUTEX_INIT_VALUE,          \
   }
Defines initial values for a declaration of AST_DLLIST_HEAD.

Since:
1.6.1

Definition at line 221 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_NOLOCK ( name,
type   ) 

Value:

struct name {                          \
      struct type *first;                    \
      struct type *last;                     \
   }
Defines a structure to be used to hold a list of specified type (with no lock).

Parameters:
name This will be the name of the defined structure.
type This is the type of each list entry.
This macro creates a structure definition that can be used to hold a list of the entries of type type. It does not actually declare (allocate) a structure; to do that, either follow this macro with the desired name of the instance you wish to declare, or use the specified name to declare instances elsewhere.

Example usage:

This would define struct entry_list, and declare an instance of it named entries, all intended to hold a list of type struct entry.

Since:
1.6.1

Definition at line 211 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_NOLOCK_INIT_VALUE

Value:

{                                   \
      .first = NULL,                      \
      .last = NULL,                       \
   }
Defines initial values for a declaration of AST_DLLIST_HEAD_NOLOCK.

Since:
1.6.1

Definition at line 243 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_NOLOCK_STATIC ( name,
type   ) 

Value:

struct name {                          \
      struct type *first;                    \
      struct type *last;                     \
   } name = AST_DLLIST_HEAD_NOLOCK_INIT_VALUE
Defines a structure to be used to hold a list of specified type, statically initialized.

This is the same as AST_DLLIST_HEAD_STATIC, except without the lock included.

Since:
1.6.1

Definition at line 341 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_SET ( head,
entry   ) 

Value:

do {                                \
      (head)->first = (entry);               \
      (head)->last = (entry);                \
      ast_mutex_init(&(head)->lock);            \
   } while (0)
Initializes a list head structure with a specified first entry.

Parameters:
head This is a pointer to the list head structure
entry pointer to the list entry that will become the head of the list
This macro initializes a list head structure by setting the head entry to the supplied value and recreating the embedded lock.
Since:
1.6.1

Definition at line 356 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_SET_NOLOCK ( head,
entry   ) 

Value:

do {                                \
      (head)->first = (entry);               \
      (head)->last = (entry);                \
   } while (0)
Initializes a list head structure with a specified first entry.

Parameters:
head This is a pointer to the list head structure
entry pointer to the list entry that will become the head of the list
This macro initializes a list head structure by setting the head entry to the supplied value.
Since:
1.6.1

Definition at line 388 of file dlinkedlists.h.

#define AST_DLLIST_HEAD_STATIC ( name,
type   ) 

Value:

struct name {                          \
      struct type *first;                    \
      struct type *last;                     \
      ast_mutex_t lock;                   \
   } name = AST_DLLIST_HEAD_INIT_VALUE
Defines a structure to be used to hold a list of specified type, statically initialized.

Parameters:
name This will be the name of the defined structure.
type This is the type of each list entry.
This macro creates a structure definition that can be used to hold a list of the entries of type type, and allocates an instance of it, initialized to be empty.

Example usage:

This would define struct entry_list, intended to hold a list of type struct entry.

Since:
1.6.1

Definition at line 284 of file dlinkedlists.h.

#define AST_DLLIST_INSERT_AFTER ( head,
listelm,
elm,
field   ) 

Inserts a list entry after a given entry.

Parameters:
head This is a pointer to the list head structure
listelm This is a pointer to the entry after which the new entry should be inserted.
elm This is a pointer to the entry to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 1011 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), and dll_tests().

#define AST_DLLIST_INSERT_AFTER_CURRENT ( elm,
field   ) 

Inserts a list node after the current node during a traversal.

Parameters:
elm This is a pointer to the node to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link nodes of this list together.
Since:
11

Definition at line 722 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), and hash_ao2_insert_node().

#define AST_DLLIST_INSERT_BEFORE ( head,
listelm,
elm,
field   ) 

Inserts a list entry before a given entry.

Parameters:
head This is a pointer to the list head structure
listelm This is a pointer to the entry before which the new entry should be inserted.
elm This is a pointer to the entry to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 1037 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE().

#define AST_DLLIST_INSERT_BEFORE_CURRENT ( elm,
field   ) 

Inserts a list node before the current node during a traversal.

Parameters:
elm This is a pointer to the entry to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link nodes of this list together.
Since:
1.6.1

Definition at line 695 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), and hash_ao2_insert_node().

#define AST_DLLIST_INSERT_BEFORE_CURRENT_BACKWARDS ( elm,
field   )     AST_DLLIST_INSERT_AFTER_CURRENT(elm, field)

Inserts a list entry after the current entry during a backwards traversal. Since this is a backwards traversal, this will insert the entry AFTER the current element. Since this is a backwards traveral, though, this would be BEFORE the current entry in traversal order. Confusing?

Parameters:
elm This is a pointer to the entry to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 903 of file dlinkedlists.h.

Referenced by dll_tests().

#define AST_DLLIST_INSERT_HEAD ( head,
elm,
field   ) 

Inserts a list entry at the head of a list.

Parameters:
head This is a pointer to the list head structure
elm This is a pointer to the entry to be inserted.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 1061 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), and hash_ao2_insert_node().

#define AST_DLLIST_INSERT_TAIL ( head,
elm,
field   ) 

Appends a list entry to the tail of a list.

Parameters:
head This is a pointer to the list head structure
elm This is a pointer to the entry to be appended.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Note: The link field in the appended entry is not modified, so if it is actually the head of a list itself, the entire list will be appended temporarily (until the next AST_DLLIST_INSERT_TAIL is performed).
Since:
1.6.1

Definition at line 1088 of file dlinkedlists.h.

Referenced by ast_module_register(), AST_TEST_DEFINE(), dll_tests(), hash_ao2_insert_node(), and start_resource().

#define AST_DLLIST_IS_MEMBER ( head,
elm,
field   ) 

Checks whether the specified list contains the element.

Parameters:
head This is a pointer to the list head structure
elm This is a pointer to the list element to see if in list.
field List node field for the next node information.
Returns:
elm if the list has elm in it.

NULL if not.

Since:
11

Definition at line 482 of file dlinkedlists.h.

#define AST_DLLIST_LAST ( head   )     ((head)->last)

Returns the last entry contained in a list.

Parameters:
head This is a pointer to the list head structure
Since:
1.6.1

Definition at line 430 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), hash_ao2_find_first(), hash_ao2_find_next(), hash_ao2_iterator_next(), and print_list().

#define AST_DLLIST_LOCK ( head   )     ast_mutex_lock(&(head)->lock)

Locks a list.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place an exclusive lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 45 of file dlinkedlists.h.

Referenced by ast_load_resource(), ast_module_helper(), ast_module_register(), ast_module_reload(), ast_module_shutdown(), ast_module_unregister(), ast_unload_resource(), find_resource(), load_modules(), and start_resource().

#define AST_DLLIST_MOVE_CURRENT ( newhead,
field   ) 

Value:

do {                                         \
         typeof ((newhead)->first) __list_cur = __list_current;   \
         AST_DLLIST_REMOVE_CURRENT(field);                  \
         AST_DLLIST_INSERT_TAIL((newhead), __list_cur, field); \
      } while (0)
Move the current list entry to another list at the tail.

Note:
This is a silly macro. It should be done explicitly otherwise the field parameter must be the same for the two lists.
AST_DLLIST_REMOVE_CURRENT(field); AST_DLLIST_INSERT_TAIL(newhead, var, other_field);

Definition at line 781 of file dlinkedlists.h.

Referenced by dll_tests().

#define AST_DLLIST_MOVE_CURRENT_BACKWARDS ( newhead,
field   ) 

Value:

do {                                         \
         typeof ((newhead)->first) __list_cur = __list_current;   \
         AST_DLLIST_REMOVE_CURRENT(field);                  \
         AST_DLLIST_INSERT_HEAD((newhead), __list_cur, field); \
      } while (0)
Move the current list entry to another list at the head.

Note:
This is a silly macro. It should be done explicitly otherwise the field parameter must be the same for the two lists.
AST_DLLIST_REMOVE_CURRENT(field); AST_DLLIST_INSERT_HEAD(newhead, var, other_field);

Definition at line 800 of file dlinkedlists.h.

Referenced by dll_tests().

#define AST_DLLIST_NEXT ( elm,
field   )     AST_DLLIST_NEXT_DIRECTION(elm, field, first)

Returns the next entry in the list after the given entry.

Parameters:
elm This is a pointer to the current entry.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 445 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), hash_ao2_find_first(), hash_ao2_find_next(), and hash_ao2_iterator_next().

#define AST_DLLIST_NEXT_DIRECTION ( elm,
field,
direction   )     ((elm)->field.direction)

Definition at line 434 of file dlinkedlists.h.

#define AST_DLLIST_PREV ( elm,
field   )     AST_DLLIST_NEXT_DIRECTION(elm, field, last)

Returns the previous entry in the list before the given entry.

Parameters:
elm This is a pointer to the current entry.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Since:
1.6.1

Definition at line 456 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), hash_ao2_find_first(), hash_ao2_find_next(), and hash_ao2_iterator_next().

#define AST_DLLIST_REMOVE ( head,
elm,
field   ) 

Removes a specific entry from a list.

Parameters:
head This is a pointer to the list head structure
elm This is a pointer to the entry to be removed.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Warning:
The removed entry is not freed.
Since:
1.6.1

Definition at line 1198 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), hash_ao2_node_destructor(), and start_resource().

#define AST_DLLIST_REMOVE_CURRENT ( field   ) 

Removes the current entry from a list during a traversal.

Parameters:
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Note:
This macro can only be used inside an AST_DLLIST_TRAVERSE_SAFE_BEGIN() block; it is used to unlink the current entry from the list without affecting the list traversal (and without having to re-traverse the list to modify the previous entry, if any).
Since:
1.6.1

Definition at line 752 of file dlinkedlists.h.

Referenced by ast_module_shutdown(), ast_module_unregister(), AST_TEST_DEFINE(), destroy_test_container(), and dll_tests().

#define AST_DLLIST_REMOVE_HEAD ( head,
field   ) 

Removes and returns the head entry from a list.

Parameters:
head This is a pointer to the list head structure
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
Removes the head entry from the list, and returns a pointer to it. This macro is safe to call on an empty list.
Since:
1.6.1

Definition at line 1141 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), and dll_tests().

#define AST_DLLIST_REMOVE_TAIL ( head,
field   ) 

Removes and returns the tail node from a list.

Parameters:
head This is a pointer to the list head structure
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link nodes of this list together.
Removes the tail entry from the list, and returns a pointer to it. This macro is safe to call on an empty list.
Since:
11

Definition at line 1170 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE().

#define AST_DLLIST_REMOVE_VERIFY ( head,
elm,
field   ) 

Value:

({                                                 \
      typeof((elm)) __res = AST_DLLIST_IS_MEMBER(head, elm, field);  \
      AST_DLLIST_REMOVE(head, __res, field);                   \
      __res;                                             \
   })
Removes a specific node from a list if it is in the list.

Parameters:
head This is a pointer to the list head structure
elm This is a pointer to the node to be removed.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link nodes of this list together.
Warning:
The removed node is not freed.
Returns:
elm if the list had elm in it.

NULL if not.

Since:
11

Definition at line 1230 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE().

#define AST_DLLIST_TRAVERSE ( head,
var,
field   )     AST_DLLIST_TRAVERSE_DIRECTION(head, var, field, first)

Loops over (traverses) the entries in a list.

Parameters:
head This is a pointer to the list head structure
var This is the name of the variable that will hold a pointer to the current list entry on each iteration. It must be declared before calling this macro.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
This macro is use to loop over (traverse) the entries in a list. It uses a for loop, and supplies the enclosed code with a pointer to each list entry as it loops. It is typically used as follows:
 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE(&entries, current, list) {
    (do something with current here)
 }
Warning:
If you modify the forward-link pointer contained in the current entry while inside the loop, the behavior will be unpredictable. At a minimum, the following macros will modify the forward-link pointer, and should not be used inside AST_DLLIST_TRAVERSE() against the entry pointed to by the current pointer without careful consideration of their consequences:
Since:
1.6.1

Definition at line 575 of file dlinkedlists.h.

Referenced by ast_module_helper(), ast_module_reload(), ast_module_shutdown(), ast_update_module_list(), dbl_list_expect_forward(), find_resource(), load_modules(), and print_list().

#define AST_DLLIST_TRAVERSE_BACKWARDS ( head,
var,
field   )     AST_DLLIST_TRAVERSE_DIRECTION(head, var, field, last)

Loops over (traverses) the entries in a list in reverse order, starting at the end.

Parameters:
head This is a pointer to the list head structure
var This is the name of the variable that will hold a pointer to the current list entry on each iteration. It must be declared before calling this macro.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
This macro is use to loop over (traverse) the entries in a list in reverse order. It uses a for loop, and supplies the enclosed code with a pointer to each list entry as it loops. It is typically used as follows:
 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE_BACKWARDS(&entries, current, list) {
    (do something with current here)
 }
Warning:
If you modify the forward-link pointer contained in the current entry while inside the loop, the behavior will be unpredictable. At a minimum, the following macros will modify the forward-link pointer, and should not be used inside AST_DLLIST_TRAVERSE() against the entry pointed to by the current pointer without careful consideration of their consequences:
Since:
1.6.1

Definition at line 617 of file dlinkedlists.h.

Referenced by dbl_list_expect_reverse(), and print_list_backwards().

#define AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN ( head,
var,
field   )     AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(head, var, field, last)

Loops safely over (traverses) the entries in a list.

Parameters:
head This is a pointer to the list head structure
var This is the name of the variable that will hold a pointer to the current list entry on each iteration. It must be declared before calling this macro.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
This macro is used to safely loop over (traverse) the entries in a list. It uses a for loop, and supplies the enclosed code with a pointer to each list entry as it loops. It is typically used as follows:

 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE_SAFE_BEGIN(&entries, current, list) {
    (do something with current here)
 }
 AST_DLLIST_TRAVERSE_SAFE_END;

It differs from AST_DLLIST_TRAVERSE() in that the code inside the loop can modify (or even free, after calling AST_DLLIST_REMOVE_CURRENT()) the entry pointed to by the current pointer without affecting the loop traversal.

Since:
1.6.1

Definition at line 887 of file dlinkedlists.h.

Referenced by ast_module_shutdown(), ast_module_unregister(), AST_TEST_DEFINE(), destroy_test_container(), dll_tests(), and hash_ao2_insert_node().

#define AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END

Closes a safe loop traversal block.

Since:
1.6.1

Definition at line 920 of file dlinkedlists.h.

Referenced by ast_module_shutdown(), ast_module_unregister(), AST_TEST_DEFINE(), destroy_test_container(), and hash_ao2_insert_node().

#define AST_DLLIST_TRAVERSE_DIRECTION ( head,
var,
field,
start   )     for ((var) = (head)->start; (var); (var) = AST_DLLIST_NEXT_DIRECTION(var, field, start))

Traverse a doublly linked list using the specified direction list.

Parameters:
head List head structure pointer.
var This is the name of the variable that will hold a pointer to the current list node on each iteration. It must be declared before calling this macro.
field List node field for the next node information. (declared using AST_DLLIST_ENTRY())
start Specified list node to start traversal: first or last
This macro is use to loop over (traverse) the nodes in a list. It uses a for loop, and supplies the enclosed code with a pointer to each list node as it loops. It is typically used as follows:
 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE_DIRECTION(&entries, current, list, first) {
    (do something with current here (travers list in forward direction))
 }
 ...
 AST_DLLIST_TRAVERSE_DIRECTION(&entries, current, list, last) {
    (do something with current here (travers list in reverse direction))
 }

Since:
11

Definition at line 533 of file dlinkedlists.h.

#define AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN ( head,
var,
field,
start   ) 

Safe traversal of a doublly linked list using the specified direction list.

Parameters:
head List head structure pointer.
var This is the name of the variable that will hold a pointer to the current list node on each iteration. It must be declared before calling this macro.
field List node field for the next node information. (declared using AST_DLLIST_ENTRY())
start Specified list node to start traversal: first or last
This macro is used to safely loop over (traverse) the nodes in a list. It uses a for loop, and supplies the enclosed code with a pointer to each list node as it loops. It is typically used as follows:

 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(&entries, current, list, first) {
    (do something with current here (travers list in forward direction))
 }
 ...
 AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(&entries, current, list, last) {
    (do something with current here (travers list in reverse direction))
 }
 AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END;

It differs from AST_DLLIST_TRAVERSE() in that the code inside the loop can modify (or even free, after calling AST_DLLIST_REMOVE_CURRENT()) the entry pointed to by the current pointer without affecting the loop traversal.

Since:
11

Definition at line 662 of file dlinkedlists.h.

#define AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END   } while (0)

Definition at line 809 of file dlinkedlists.h.

#define AST_DLLIST_TRAVERSE_SAFE_BEGIN ( head,
var,
field   )     AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN(head, var, field, first)

Loops safely over (traverses) the entries in a list.

Parameters:
head This is a pointer to the list head structure
var This is the name of the variable that will hold a pointer to the current list entry on each iteration. It must be declared before calling this macro.
field This is the name of the field (declared using AST_DLLIST_ENTRY()) used to link entries of this list together.
This macro is used to safely loop over (traverse) the entries in a list. It uses a for loop, and supplies the enclosed code with a pointer to each list entry as it loops. It is typically used as follows:

 static AST_DLLIST_HEAD(entry_list, list_entry) entries;
 ...
 struct list_entry {
     ...
     AST_DLLIST_ENTRY(list_entry) list;
 }
 ...
 struct list_entry *current;
 ...
 AST_DLLIST_TRAVERSE_SAFE_BEGIN(&entries, current, list) {
    (do something with current here)
 }
 AST_DLLIST_TRAVERSE_SAFE_END;

It differs from AST_DLLIST_TRAVERSE() in that the code inside the loop can modify (or even free, after calling AST_DLLIST_REMOVE_CURRENT()) the entry pointed to by the current pointer without affecting the loop traversal.

Since:
1.6.1

Definition at line 848 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), and hash_ao2_insert_node().

#define AST_DLLIST_TRAVERSE_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END

Closes a safe loop traversal block.

Since:
1.6.1

Definition at line 912 of file dlinkedlists.h.

Referenced by AST_TEST_DEFINE(), dll_tests(), and hash_ao2_insert_node().

#define AST_DLLIST_TRYLOCK ( head   )     ast_mutex_trylock(&(head)->lock)

Locks a list, without blocking if the list is locked.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place an exclusive lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 84 of file dlinkedlists.h.

Referenced by ast_update_module_list().

#define AST_DLLIST_UNLOCK ( head   )     ast_mutex_unlock(&(head)->lock)

Attempts to unlock a list.

Parameters:
head This is a pointer to the list head structure
This macro attempts to remove an exclusive lock from the list head structure pointed to by head. If the list was not locked by this thread, this macro has no effect.
Since:
1.6.1

Definition at line 122 of file dlinkedlists.h.

Referenced by ast_load_resource(), ast_module_helper(), ast_module_register(), ast_module_reload(), ast_module_shutdown(), ast_module_unregister(), ast_unload_resource(), ast_update_module_list(), find_resource(), load_modules(), and start_resource().

#define AST_RWDLLIST_APPEND_DLLIST   AST_DLLIST_APPEND_DLLIST

Definition at line 1129 of file dlinkedlists.h.

#define AST_RWDLLIST_EMPTY   AST_DLLIST_EMPTY

Definition at line 470 of file dlinkedlists.h.

#define AST_RWDLLIST_ENTRY   AST_DLLIST_ENTRY

Definition at line 414 of file dlinkedlists.h.

#define AST_RWDLLIST_FIRST   AST_DLLIST_FIRST

Definition at line 423 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD ( name,
type   ) 

Value:

struct name {                          \
      struct type *first;                    \
      struct type *last;                     \
      ast_rwlock_t lock;                     \
   }
Defines a structure to be used to hold a read/write list of specified type.

Parameters:
name This will be the name of the defined structure.
type This is the type of each list entry.
This macro creates a structure definition that can be used to hold a list of the entries of type type. It does not actually declare (allocate) a structure; to do that, either follow this macro with the desired name of the instance you wish to declare, or use the specified name to declare instances elsewhere.

Example usage:

 static AST_RWDLLIST_HEAD(entry_list, entry) entries;

This would define struct entry_list, and declare an instance of it named entries, all intended to hold a list of type struct entry.

Since:
1.6.1

Definition at line 184 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD_DESTROY ( head   ) 

Value:

{                             \
      (head)->first = NULL;            \
      (head)->last = NULL;          \
      ast_rwlock_destroy(&(head)->lock);  \
   }
Destroys an rwlist head structure.

Parameters:
head This is a pointer to the list head structure
This macro destroys a list head structure by setting the head entry to NULL (empty list) and destroying the embedded lock. It does not free the structure from memory.
Since:
1.6.1

Definition at line 979 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD_INIT ( head   ) 

Value:

{                             \
      (head)->first = NULL;            \
      (head)->last = NULL;          \
      ast_rwlock_init(&(head)->lock);     \
   }
Initializes an rwlist head structure.

Parameters:
head This is a pointer to the list head structure
This macro initializes a list head structure by setting the head entry to NULL (empty list) and recreating the embedded lock.
Since:
1.6.1

Definition at line 947 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD_INIT_VALUE

Value:

{                                   \
      .first = NULL,                      \
      .last = NULL,                       \
      .lock = AST_RWLOCK_INIT_VALUE,            \
   }
Defines initial values for a declaration of AST_RWDLLIST_HEAD.

Since:
1.6.1

Definition at line 232 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD_SET ( head,
entry   ) 

Value:

do {                                \
      (head)->first = (entry);               \
      (head)->last = (entry);                \
      ast_rwlock_init(&(head)->lock);           \
   } while (0)
Initializes an rwlist head structure with a specified first entry.

Parameters:
head This is a pointer to the list head structure
entry pointer to the list entry that will become the head of the list
This macro initializes a list head structure by setting the head entry to the supplied value and recreating the embedded lock.
Since:
1.6.1

Definition at line 372 of file dlinkedlists.h.

#define AST_RWDLLIST_HEAD_STATIC ( name,
type   ) 

Defines a structure to be used to hold a read/write list of specified type, statically initialized.

Parameters:
name This will be the name of the defined structure.
type This is the type of each list entry.
This macro creates a structure definition that can be used to hold a list of the entries of type type, and allocates an instance of it, initialized to be empty.

Example usage:

This would define struct entry_list, intended to hold a list of type struct entry.

Since:
1.6.1

Definition at line 311 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_AFTER   AST_DLLIST_INSERT_AFTER

Definition at line 1025 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_AFTER_CURRENT   AST_DLLIST_INSERT_AFTER_CURRENT

Definition at line 739 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_BEFORE   AST_DLLIST_INSERT_BEFORE

Definition at line 1051 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_BEFORE_CURRENT   AST_DLLIST_INSERT_BEFORE_CURRENT

Definition at line 712 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_BEFORE_CURRENT_BACKWARDS   AST_DLLIST_INSERT_BEFORE_CURRENT_BACKWARDS

Definition at line 906 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_HEAD   AST_DLLIST_INSERT_HEAD

Definition at line 1074 of file dlinkedlists.h.

#define AST_RWDLLIST_INSERT_TAIL   AST_DLLIST_INSERT_TAIL

Definition at line 1102 of file dlinkedlists.h.

#define AST_RWDLLIST_IS_MEMBER   AST_DLLIST_IS_MEMBER

Definition at line 497 of file dlinkedlists.h.

#define AST_RWDLLIST_LAST   AST_DLLIST_LAST

Definition at line 432 of file dlinkedlists.h.

#define AST_RWDLLIST_MOVE_CURRENT   AST_DLLIST_MOVE_CURRENT

Definition at line 788 of file dlinkedlists.h.

#define AST_RWDLLIST_MOVE_CURRENT_BACKWARDS   AST_DLLIST_MOVE_CURRENT_BACKWARDS

Definition at line 807 of file dlinkedlists.h.

#define AST_RWDLLIST_NEXT   AST_DLLIST_NEXT

Definition at line 447 of file dlinkedlists.h.

#define AST_RWDLLIST_NEXT_DIRECTION   AST_DLLIST_NEXT_DIRECTION

Definition at line 436 of file dlinkedlists.h.

#define AST_RWDLLIST_PREV   AST_DLLIST_PREV

Definition at line 458 of file dlinkedlists.h.

#define AST_RWDLLIST_RDLOCK ( head   )     ast_rwlock_rdlock(&(head)->lock)

Read locks a list.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place a read lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 71 of file dlinkedlists.h.

#define AST_RWDLLIST_REMOVE   AST_DLLIST_REMOVE

Definition at line 1217 of file dlinkedlists.h.

#define AST_RWDLLIST_REMOVE_CURRENT   AST_DLLIST_REMOVE_CURRENT

Definition at line 769 of file dlinkedlists.h.

#define AST_RWDLLIST_REMOVE_HEAD   AST_DLLIST_REMOVE_HEAD

Definition at line 1158 of file dlinkedlists.h.

#define AST_RWDLLIST_REMOVE_TAIL   AST_DLLIST_REMOVE_TAIL

Definition at line 1187 of file dlinkedlists.h.

#define AST_RWDLLIST_REMOVE_VERIFY   AST_DLLIST_REMOVE_VERIFY

Definition at line 1237 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE   AST_DLLIST_TRAVERSE

Definition at line 578 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_BACKWARDS   AST_DLLIST_TRAVERSE_BACKWARDS

Definition at line 620 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN   AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_BEGIN

Definition at line 890 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_BACKWARDS_SAFE_END   AST_DLLIST_TRAVERSE_BACKWARDS_SAFE_END

Definition at line 922 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_DIRECTION   AST_DLLIST_TRAVERSE_DIRECTION

Definition at line 536 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_BEGIN

Definition at line 685 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_DIRECTION_SAFE_END   AST_DLLIST_TRAVERSE_DIRECTION_SAFE_END

Definition at line 812 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_SAFE_BEGIN   AST_DLLIST_TRAVERSE_SAFE_BEGIN

Definition at line 851 of file dlinkedlists.h.

#define AST_RWDLLIST_TRAVERSE_SAFE_END   AST_DLLIST_TRAVERSE_SAFE_END

Definition at line 914 of file dlinkedlists.h.

#define AST_RWDLLIST_TRYRDLOCK ( head   )     ast_rwlock_tryrdlock(&(head)->lock)

Read locks a list, without blocking if the list is locked.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place a read lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 110 of file dlinkedlists.h.

#define AST_RWDLLIST_TRYWRLOCK ( head   )     ast_rwlock_trywrlock(&(head)->lock)

Write locks a list, without blocking if the list is locked.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place an exclusive write lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 97 of file dlinkedlists.h.

#define AST_RWDLLIST_UNLOCK ( head   )     ast_rwlock_unlock(&(head)->lock)

Attempts to unlock a read/write based list.

Parameters:
head This is a pointer to the list head structure
This macro attempts to remove a read or write lock from the list head structure pointed to by head. If the list was not locked by this thread, this macro has no effect.
Since:
1.6.1

Definition at line 134 of file dlinkedlists.h.

#define AST_RWDLLIST_WRLOCK ( head   )     ast_rwlock_wrlock(&(head)->lock)

Write locks a list.

Parameters:
head This is a pointer to the list head structure
This macro attempts to place an exclusive write lock in the list head structure pointed to by head.
Return values:
0 on success
non-zero on failure
Since:
1.6.1

Definition at line 58 of file dlinkedlists.h.


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