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Add a more efficient way of allocating structures that use stringfields

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This commit adds an API call that can be used to allocate a structure along with this stringfield storage in a single allocation.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@192362 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2009-05-05 14:17:18 +00:00
parent 1f49e675bb
commit 2746f589b7
2 changed files with 74 additions and 0 deletions
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25
include/asterisk/stringfields.h
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@@ -138,6 +138,7 @@ struct ast_string_field_pool {
*/
struct ast_string_field_mgr {
ast_string_field last_alloc; /*!< the last field allocated */
struct ast_string_field_pool *embedded_pool; /*!< pointer to the embedded pool, if any */
#if defined(__AST_DEBUG_MALLOC)
const char *owner_file; /*!< filename of owner */
const char *owner_func; /*!< function name of owner */
@@ -253,6 +254,30 @@ void __ast_string_field_ptr_build_va(struct ast_string_field_mgr *mgr,
int __ast_string_field_init(struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head,
int needed, const char *file, int lineno, const char *func);
/*!
* \brief Allocate a structure with embedded stringfields in a single allocation
* \param n Number of structures to allocate (see ast_calloc)
* \param type The type of structure to allocate
* \param size The number of bytes of space (minimum) to allocate for stringfields to use
*
* This function will allocate memory for one or more structures that use stringfields, and
* also allocate space for the stringfields and initialize the stringfield management
* structure embedded in the outer structure.
*
* \since 1.6.3
*/
#define ast_calloc_with_stringfields(n, type, size) \
__ast_calloc_with_stringfields(n, sizeof(type), offsetof(type, __field_mgr), offsetof(type, __field_mgr_pool), \
size, __FILE__, __LINE__, __PRETTY_FUNCTION__)
/*!
* \internal
* \brief internal version of ast_calloc_with_stringfields
*/
void * attribute_malloc __ast_calloc_with_stringfields(unsigned int num_structs, size_t struct_size, size_t field_mgr_offset,
size_t field_mgr_pool_offset, size_t pool_size, const char *file,
int lineno, const char *func);
/*!
\internal
\brief Release a field's allocation from a pool