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Implement FscSetCacheSize matching original kernel implementation.

This commit is contained in:
Fisherman166 2020-06-06 13:34:40 -07:00
parent e5af2b1754
commit 6d8d692b7c
1 changed files with 25 additions and 7 deletions
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32
src/core/kernel/exports/EmuKrnlFs.cpp
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@ -70,6 +70,9 @@ XBSYSAPI EXPORTNUM(36) xboxkrnl::VOID NTAPI xboxkrnl::FscInvalidateIdleBlocks()
LOG_UNIMPLEMENTED();
}
static xboxkrnl::KEVENT FscCacheEvent;
static xboxkrnl::PKEVENT FscCacheEventPtr = nullptr;
// ******************************************************************
// * 0x0025 - FscSetCacheSize()
// ******************************************************************
@ -80,18 +83,33 @@ XBSYSAPI EXPORTNUM(37) xboxkrnl::NTSTATUS NTAPI xboxkrnl::FscSetCacheSize
{
LOG_FUNC_ONE_ARG(NumberOfCachePages);
NTSTATUS ret = STATUS_SUCCESS;
if (FscCacheEventPtr == nullptr) {
KeInitializeEvent(&FscCacheEvent, SynchronizationEvent, 1);
FscCacheEventPtr = &FscCacheEvent;
}
if (NumberOfCachePages > FSCACHE_MAXIMUM_NUMBER_OF_CACHE_PAGES)
NTSTATUS ret = STATUS_SUCCESS;
KeWaitForSingleObject(FscCacheEventPtr, Executive, 0, 0, 0);
UCHAR orig_irql = KeRaiseIrqlToDpcLevel();
if (NumberOfCachePages > FSCACHE_MAXIMUM_NUMBER_OF_CACHE_PAGES) {
ret = STATUS_INVALID_PARAMETER;
else
{
// TODO : Actually allocate file system cache pages, for example do something like this :
// if (NumberOfCachePages < g_FscNumberOfCachePages) FscShrinkCacheSize(NumberOfCachePages)
// if (NumberOfCachePages > g_FscNumberOfCachePages) FscGrowCacheSize(NumberOfCachePages), possibly return STATUS_INSUFFICIENT_RESOURCES
}
else {
// TODO : Actually allocate file system cache pages.
#if 0
if (NumberOfCachePages > g_FscNumberOfCachePages) {
ret = FscGrowCacheSize(NumberOfCachePages);
}
else if (NumberOfCachePages < g_FscNumberOfCachePages) {
ret = FscShrinkCacheSize(NumberOfCachePages);
}
#endif
g_FscNumberOfCachePages = NumberOfCachePages;
}
KfLowerIrql(orig_irql);
KeSetEvent(FscCacheEventPtr, 0, 0);
RETURN(ret);
}