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astobj2: Support using a separate object for locking.

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Create ao2_alloc_with_lockobj function to support shared locking.

Change-Id: Iba687eb9843922be7e481e23a32c0700ecf88a80
This commit is contained in:
Corey Farrell
2016-08-26 14:18:10 -04:00
parent d3c4b901d4
commit 0c5b6e9ff5
2 changed files with 100 additions and 2 deletions
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27
include/asterisk/astobj2.h
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@@ -368,6 +368,13 @@ enum ao2_alloc_opts {
AO2_ALLOC_OPT_LOCK_NOLOCK = (2 << 0),
/*! The ao2 object locking option field mask. */
AO2_ALLOC_OPT_LOCK_MASK = (3 << 0),
/*!
* \internal The ao2 object uses a separate object for locking.
*
* \note This option is used internally by ao2_alloc_with_lockobj and
* should never be passed directly to ao2_alloc.
*/
AO2_ALLOC_OPT_LOCK_OBJ = AO2_ALLOC_OPT_LOCK_MASK,
};
/*!
@@ -408,6 +415,26 @@ void *__ao2_alloc(size_t data_size, ao2_destructor_fn destructor_fn, unsigned in
/*! @} */
/*!
* \since 14.1.0
* \brief Allocate and initialize an object with separate locking.
*
* \param data_size The sizeof() of the user-defined structure.
* \param destructor_fn The destructor function (can be NULL)
* \param lockobj A separate ao2 object that will provide locking.
* \param debug_msg An ao2 object debug tracing message.
* \return A pointer to user-data.
*
* \see \ref ao2_alloc for additional details.
*
* \note lockobj must be a valid AO2 object.
*/
#define ao2_alloc_with_lockobj(data_size, destructor_fn, lockobj, tag) \
__ao2_alloc_with_lockobj((data_size), (destructor_fn), (lockobj), (tag), __FILE__, __LINE__, __PRETTY_FUNCTION__)
void *__ao2_alloc_with_lockobj(size_t data_size, ao2_destructor_fn destructor_fn, void *lockobj,
const char *tag, const char *file, int line, const char *func) attribute_warn_unused_result;
/*! \brief
* Reference/unreference an object and return the old refcount.
*