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fix issue #210 where multiple static instances of mimalloc in DLL's compete for the same virtual memory area

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daan 2020-03-06 16:43:39 -08:00
parent 5bc276c23b
commit 72f758c433
1 changed files with 6 additions and 1 deletions
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7
src/os.c
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@ -209,7 +209,12 @@ static void* mi_win_virtual_allocx(void* addr, size_t size, size_t try_alignment
// on 64-bit systems, try to use the virtual address area after 4TiB for 4MiB aligned allocations
void* hint;
if (addr == NULL && (hint = mi_os_get_aligned_hint(try_alignment,size)) != NULL) {
return VirtualAlloc(hint, size, flags, PAGE_READWRITE);
void* p = VirtualAlloc(hint, size, flags, PAGE_READWRITE);
if (p != NULL) return p;
DWORD err = GetLastError();
if (err != ERROR_INVALID_ADDRESS) { // if linked with multiple instances, we may have tried to allocate at an already allocated area
return NULL;
}
}
#endif
#if defined(MEM_EXTENDED_PARAMETER_TYPE_BITS)