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Refactor AllocateMemory and FreeMemory functions

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rcaridade145 2026-01-11 14:00:55 +00:00 committed by GitHub
parent dfabe7faa7
commit d0f73b1c6a
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1 changed files with 51 additions and 25 deletions
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76
src/util/MemMapper/MemMapperUnix.cpp
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@ -40,31 +40,57 @@ namespace MemMapper
munmap(baseAddr, size);
}
void* AllocateMemory(void* baseAddr, size_t size, PAGE_PERMISSION permissionFlags, bool fromReservation)
{
void* r;
if(fromReservation)
{
uint64 page_size = sysconf(_SC_PAGESIZE);
void* page = baseAddr;
if ( (uint64) baseAddr % page_size != 0 )
page = (void*) ((uint64)baseAddr & ~(page_size - 1));
if( mprotect(page, size, GetProt(permissionFlags)) == 0 )
r = baseAddr;
else
r = nullptr;
}
else
r = mmap(baseAddr, size, GetProt(permissionFlags), MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
return r;
}
void* AllocateMemory(void* baseAddr, size_t size,
PAGE_PERMISSION permissionFlags,
bool fromReservation)
{
size_t pageSize = sPageSize;
uintptr_t addr = reinterpret_cast<uintptr_t>(baseAddr);
uintptr_t pageStart = addr & ~(pageSize - 1);
size_t offset = addr - pageStart;
size_t totalSize = offset + size;
totalSize = (totalSize + pageSize - 1) & ~(pageSize - 1);
if (fromReservation)
{
if (mprotect(reinterpret_cast<void*>(pageStart),
totalSize,
GetProt(permissionFlags)) != 0)
return nullptr;
return baseAddr;
}
return mmap(baseAddr,
size,
GetProt(permissionFlags),
MAP_PRIVATE | MAP_ANONYMOUS,
-1,
0);
}
void FreeMemory(void* baseAddr, size_t size, bool fromReservation)
{
if (!fromReservation)
{
munmap(baseAddr, size);
return;
}
uintptr_t addr = reinterpret_cast<uintptr_t>(baseAddr);
uintptr_t pageStart = addr & ~(sPageSize - 1);
size_t offset = addr - pageStart;
size_t totalSize = offset + size;
totalSize = (totalSize + sPageSize - 1) & ~(sPageSize - 1);
mprotect(reinterpret_cast<void*>(pageStart),
totalSize,
PROT_NONE);
}
void FreeMemory(void* baseAddr, size_t size, bool fromReservation)
{
if (fromReservation)
mprotect(baseAddr, size, PROT_NONE);
else
munmap(baseAddr, size);
}
};