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New function isc_mem_putanddetach().

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This commit is contained in:
Mark Andrews 2000-09-05 03:30:19 +00:00
parent fa263add26
commit 1162a4e02a
2 changed files with 50 additions and 2 deletions
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11
lib/isc/include/isc/mem.h
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: mem.h,v 1.42 2000/08/31 16:58:28 gson Exp $ */
/* $Id: mem.h,v 1.43 2000/09/05 03:30:19 marka Exp $ */
#ifndef ISC_MEM_H
#define ISC_MEM_H 1
@ -102,6 +102,11 @@ extern unsigned int isc_mem_debugging;
isc__mem_put((c), (p), (s) _ISC_MEM_FILELINE); \
(p) = NULL; \
} while (0)
#define isc_mem_putanddetach(c, p, s) \
do { \
isc__mem_putanddetach((c), (p), (s) _ISC_MEM_FILELINE); \
(p) = NULL; \
} while (0)
#define isc_mem_free(c, p) \
do { \
isc__mem_free((c), (p) _ISC_MEM_FILELINE); \
@ -114,6 +119,8 @@ extern unsigned int isc_mem_debugging;
} while (0)
#else
#define isc_mem_put(c, p, s) isc__mem_put((c), (p), (s) _ISC_MEM_FILELINE)
#define isc_mem_putanddetach(c, p, s) \
isc__mem_putanddetach((c), (p), (s) _ISC_MEM_FILELINE)
#define isc_mem_free(c, p) isc__mem_free((c), (p) _ISC_MEM_FILELINE)
#define isc_mempool_put(c, p) isc__mempool_put((c), (p) _ISC_MEM_FILELINE)
#endif
@ -127,6 +134,8 @@ isc_result_t isc_mem_ondestroy(isc_mem_t *ctx,
isc_event_t **event);
void * isc__mem_get(isc_mem_t *, size_t
_ISC_MEM_FLARG);
void isc__mem_putanddetach(isc_mem_t **, void *,
size_t _ISC_MEM_FLARG);
void isc__mem_put(isc_mem_t *, void *,
size_t _ISC_MEM_FLARG);
isc_result_t isc_mem_preallocate(isc_mem_t *);

41
lib/isc/mem.c
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: mem.c,v 1.61 2000/08/31 12:15:16 marka Exp $ */
/* $Id: mem.c,v 1.62 2000/09/05 03:30:18 marka Exp $ */
#include <config.h>
@ -755,6 +755,45 @@ isc_mem_detach(isc_mem_t **ctxp) {
*ctxp = NULL;
}
/*
* isc_mem_putanddetach() is the equivalent of:
*
* mctx = NULL;
* isc_mem_attach(ptr->mctx, &mctx);
* isc_mem_detach(&ptr->mctx);
* isc_mem_put(mctx, ptr, sizeof(*ptr);
* isc_mem_detach(&mctx);
*/
void
isc__mem_putanddetach(isc_mem_t **ctxp, void *ptr, size_t size FLARG) {
isc_mem_t *ctx;
isc_boolean_t want_destroy = ISC_FALSE;
REQUIRE(ctxp != NULL);
ctx = *ctxp;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ptr != NULL);
/*
* Must be before mem_putunlocked() as ctxp is usually within
* [ptr..ptr+size).
*/
*ctxp = NULL;
LOCK(&ctx->lock);
DELETE_TRACE(ctx, ptr, size, file, line);
mem_putunlocked(ctx, ptr, size);
INSIST(ctx->references > 0);
ctx->references--;
if (ctx->references == 0)
want_destroy = ISC_TRUE;
UNLOCK(&ctx->lock);
if (want_destroy)
destroy(ctx);
}
void
isc_mem_destroy(isc_mem_t **ctxp) {
isc_mem_t *ctx;