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Wrapped actions on IRQ-critical-section object in a validity test to fix crash in Win98/ME's kernel.dll

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This commit is contained in:
tomch 2006-05-07 13:47:52 +00:00
parent 2f338e116f
commit 99825c335a
1 changed files with 16 additions and 7 deletions
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23
source/CPU.cpp
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@ -111,6 +111,7 @@ static signed long nInternalCyclesLeft;
// Assume all interrupt sources assert until the device is told to stop:
// - eg by r/w to device's register or a machine reset
static bool g_bCritSectionValid = false; // Deleting CritialSection when not valid causes crash on Win98
static CRITICAL_SECTION g_CriticalSection; // To guard /g_bmIRQ/
static volatile UINT32 g_bmIRQ = 0;
@ -792,7 +793,11 @@ void CpuDestroy () {
cpulibrary[loop] = (HINSTANCE)0;
}
DeleteCriticalSection(&g_CriticalSection);
if (g_bCritSectionValid)
{
DeleteCriticalSection(&g_CriticalSection);
g_bCritSectionValid = false;
}
}
//===========================================================================
@ -913,6 +918,7 @@ void CpuInitialize () {
regs.sp = 0x01FF;
InitializeCriticalSection(&g_CriticalSection);
g_bCritSectionValid = true;
CpuIrqReset();
#ifdef _X86_
@ -1016,23 +1022,26 @@ BOOL CpuSupportsFastPaging () {
void CpuIrqReset()
{
EnterCriticalSection(&g_CriticalSection);
_ASSERT(g_bCritSectionValid);
if (g_bCritSectionValid) EnterCriticalSection(&g_CriticalSection);
g_bmIRQ = 0;
LeaveCriticalSection(&g_CriticalSection);
if (g_bCritSectionValid) LeaveCriticalSection(&g_CriticalSection);
}
void CpuIrqAssert(eIRQSRC Device)
{
EnterCriticalSection(&g_CriticalSection);
_ASSERT(g_bCritSectionValid);
if (g_bCritSectionValid) EnterCriticalSection(&g_CriticalSection);
g_bmIRQ |= 1<<Device;
LeaveCriticalSection(&g_CriticalSection);
if (g_bCritSectionValid) LeaveCriticalSection(&g_CriticalSection);
}
void CpuIrqDeassert(eIRQSRC Device)
{
EnterCriticalSection(&g_CriticalSection);
_ASSERT(g_bCritSectionValid);
if (g_bCritSectionValid) EnterCriticalSection(&g_CriticalSection);
g_bmIRQ &= ~(1<<Device);
LeaveCriticalSection(&g_CriticalSection);
if (g_bCritSectionValid) LeaveCriticalSection(&g_CriticalSection);
}
//===========================================================================