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msvcr120: Fixed bugs in Concurrency::critical_section.

This commit is contained in:
Yifu Wang 2014-12-30 15:03:36 -08:00 committed by Alexandre Julliard
parent f21a968d1c
commit a11c8758b2
1 changed files with 19 additions and 12 deletions
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31
dlls/msvcrt/lock.c
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@ -384,10 +384,11 @@ void __thiscall critical_section_lock(critical_section *this)
NtWaitForKeyedEvent(keyed_event, &q, 0, NULL);
}
this->unk_active.next = NULL;
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, &q) != &q)
spin_wait_for_next_cs(&q);
cs_set_head(this, &q);
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, &q) != &q) {
spin_wait_for_next_cs(&q);
this->unk_active.next = q.next;
}
}
/* ?try_lock@critical_section@Concurrency@@QAE_NXZ */
@ -406,11 +407,11 @@ MSVCRT_bool __thiscall critical_section_try_lock(critical_section *this)
memset(&q, 0, sizeof(q));
if(!InterlockedCompareExchangePointer(&this->tail, &q, NULL)) {
this->unk_active.next = NULL;
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, &q) != &q)
spin_wait_for_next_cs(&q);
cs_set_head(this, &q);
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, &q) != &q) {
spin_wait_for_next_cs(&q);
this->unk_active.next = q.next;
}
return TRUE;
}
return FALSE;
@ -437,8 +438,10 @@ void __thiscall critical_section_unlock(critical_section *this)
break;
next = this->unk_active.next;
if(InterlockedCompareExchangePointer(&this->tail, NULL, next) == next)
if(InterlockedCompareExchangePointer(&this->tail, NULL, next) == next) {
HeapFree(GetProcessHeap(), 0, next);
return;
}
spin_wait_for_next_cs(next);
this->unk_active.next = next->next;
@ -491,14 +494,18 @@ MSVCRT_bool __thiscall critical_section_try_lock_for(
if(status == STATUS_TIMEOUT) {
if(!InterlockedExchange(&q->free, TRUE))
return FALSE;
/* A thread has signaled the event and is block waiting. */
/* We need to catch the event to wake the thread. */
NtWaitForKeyedEvent(keyed_event, q, 0, NULL);
}
}
this->unk_active.next = NULL;
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, q) != q)
spin_wait_for_next_cs(q);
cs_set_head(this, q);
if(InterlockedCompareExchangePointer(&this->tail, &this->unk_active, q) != q) {
spin_wait_for_next_cs(q);
this->unk_active.next = q->next;
}
HeapFree(GetProcessHeap(), 0, q);
return TRUE;
}