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Make vm_exit_handler installation MT-safe

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Nobuyoshi Nakada 2021-02-23 21:30:54 +09:00
parent 9299703b39
commit b7d4dcf3a6
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GPG Key ID: 7CD2805BFA3770C6
1 changed files with 11 additions and 3 deletions
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14
win32/win32.c
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@ -781,15 +781,23 @@ vm_exit_handler(ruby_vm_t *vm)
LeaveCriticalSection(&conlist_mutex); LeaveCriticalSection(&conlist_mutex);
} }
#define ATOMIC_LONG_CAS(var, oldval, newval) InterlockedCompareExchange(&(var), (newval), (oldval))
/* License: Ruby's */ /* License: Ruby's */
static void static void
install_vm_exit_handler(void) install_vm_exit_handler(void)
{ {
static bool installed = 0; static LONG installed = 0;
LONG i;
if (!installed) { while ((i = ATOMIC_LONG_CAS(installed, 0, -1)) != 1) {
if (i != 0) {
Sleep(1);
continue;
}
ruby_vm_at_exit(vm_exit_handler); ruby_vm_at_exit(vm_exit_handler);
installed = 1; ATOMIC_LONG_CAS(installed, -1, 1);
break;
} }
} }