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runtime: add error for "scratch in use"

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This commit adds the HS_SCRATCH_IN_USE error, which is returned when
Hyperscan detects that a scratch region is already in use on entry to an
API function.
This commit is contained in:
Justin Viiret
2016-04-28 09:34:37 +10:00
committed by Matthew Barr
parent 11896dcf42
commit c12b953131
7 changed files with 384 additions and 6 deletions
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29
src/scratch.h
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@@ -140,6 +140,7 @@ struct match_deduper {
*/
struct ALIGN_CL_DIRECTIVE hs_scratch {
u32 magic;
u8 in_use; /**< non-zero when being used by an API call. */
char *scratch_alloc; /* user allocated scratch object */
u32 queueCount;
u32 bStateSize; /**< sizeof block mode states */
@@ -198,6 +199,34 @@ char can_stop_matching(const struct hs_scratch *scratch) {
return scratch->core_info.status & (STATUS_TERMINATED | STATUS_EXHAUSTED);
}
/**
* \brief Mark scratch as in use.
*
* Returns non-zero if it was already in use, zero otherwise.
*/
static really_inline
char markScratchInUse(struct hs_scratch *scratch) {
DEBUG_PRINTF("marking scratch as in use\n");
assert(scratch && scratch->magic == SCRATCH_MAGIC);
if (scratch->in_use) {
DEBUG_PRINTF("scratch already in use!\n");
return 1;
}
scratch->in_use = 1;
return 0;
}
/**
* \brief Mark scratch as no longer in use.
*/
static really_inline
void unmarkScratchInUse(struct hs_scratch *scratch) {
DEBUG_PRINTF("marking scratch as not in use\n");
assert(scratch && scratch->magic == SCRATCH_MAGIC);
assert(scratch->in_use == 1);
scratch->in_use = 0;
}
#ifdef __cplusplus
} /* extern "C" */
#endif