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add is_in_heap_region function

This commit is contained in:
daan 2019-07-17 15:37:36 -07:00
parent 8390c46503
commit f646cc925d
2 changed files with 12 additions and 1 deletions
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3
include/mimalloc.h
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@ -121,7 +121,6 @@ mi_decl_export void mi_thread_stats_print(FILE* out) mi_attr_noexcept;
typedef void (mi_deferred_free_fun)(bool force, unsigned long long heartbeat);
mi_decl_export void mi_register_deferred_free(mi_deferred_free_fun* deferred_free) mi_attr_noexcept;
// ------------------------------------------------------
// Aligned allocation
// ------------------------------------------------------
@ -196,6 +195,8 @@ typedef bool (mi_cdecl mi_block_visit_fun)(const mi_heap_t* heap, const mi_heap_
mi_decl_export bool mi_heap_visit_blocks(const mi_heap_t* heap, bool visit_all_blocks, mi_block_visit_fun* visitor, void* arg);
mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept;
// ------------------------------------------------------
// Convenience
// ------------------------------------------------------

10
src/memory.c
View File

@ -104,6 +104,16 @@ static size_t mi_good_commit_size(size_t size) {
return _mi_align_up(size, _mi_os_large_page_size());
}
// Return if a pointer points into a region reserved by us.
bool mi_is_in_heap_region(const void* p) {
size_t count = mi_atomic_read(&regions_count);
for (size_t i = 0; i < count; i++) {
uint8_t* start = (uint8_t*)mi_atomic_read_ptr(&regions[i].start);
if (start != NULL && (uint8_t*)p >= start && (uint8_t*)p < start + MI_REGION_SIZE) return true;
}
return false;
}
/* ----------------------------------------------------------------------------
Commit from a region
-----------------------------------------------------------------------------*/