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add is_zero flag to prim_commit

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This commit is contained in:
daanx 2023-04-21 10:37:22 -07:00
parent 3bc577004a
commit 012f716485
5 changed files with 29 additions and 9 deletions
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18
src/prim/windows/prim.c
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@ -259,14 +259,26 @@ int _mi_prim_alloc(size_t size, size_t try_alignment, bool commit, bool allow_la
#pragma warning(disable:6250) // suppress warning calling VirtualFree without MEM_RELEASE (for decommit)
#endif
int _mi_prim_commit(void* addr, size_t size) {
int _mi_prim_commit(void* addr, size_t size, bool* is_zero) {
*is_zero = false;
/*
// zero'ing only happens on an initial commit... but checking upfront seems expensive..
_MEMORY_BASIC_INFORMATION meminfo; _mi_memzero_var(meminfo);
if (VirtualQuery(addr, &meminfo, size) > 0) {
if ((meminfo.State & MEM_COMMIT) == 0) {
*is_zero = true;
}
}
*/
// commit
void* p = VirtualAlloc(addr, size, MEM_COMMIT, PAGE_READWRITE);
return (p != NULL ? 0 : (int)GetLastError());
if (p == NULL) return (int)GetLastError();
return 0;
}
int _mi_prim_decommit(void* addr, size_t size, bool* needs_recommit) {
BOOL ok = VirtualFree(addr, size, MEM_DECOMMIT);
*needs_recommit = true; // for safetly, assume always decommitted even in the case of an error.
*needs_recommit = true; // for safety, assume always decommitted even in the case of an error.
return (ok ? 0 : (int)GetLastError());
}