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AK: Port BumpAllocator.h to Windows

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Done by forward declaring the required functions and defining the needed
constants. The defines shouldn't collide as they are from memoryapi.h.
This is done to avoid including windows.h.
This commit is contained in:
R-Goc 2024-11-21 14:15:44 +01:00 • committed by Andrew Kaster
parent c66eb5db11
commit f380b4b95b
Notes: github-actions[bot] 2024-12-09 00:38:47 +00:00
1 changed files with 20 additions and 1 deletions
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21
AK/BumpAllocator.h
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@ -10,7 +10,15 @@
#include <AK/StdLibExtras.h>
#include <AK/Types.h>
#include <AK/kmalloc.h>
#include <sys/mman.h>
#if !defined(AK_OS_WINDOWS)
# include <sys/mman.h>
#else
extern "C" __declspec(dllimport) void* __stdcall VirtualAlloc(size_t dwSize, u32 flAllocationType, u32 flProtect);
extern "C" __declspec(dllimport) bool __stdcall VirtualFree(void* lpAddress, size_t dwSize, u32 dwFreeType);
# define MEM_COMMIT 0x00001000
# define PAGE_READWRITE 0x04
# define MEM_RELEASE 0x00008000
#endif
namespace AK {
@ -73,7 +81,11 @@ public:
}
if constexpr (use_mmap) {
#if defined(AK_OS_WINDOWS)
VirtualFree((LPVOID)chunk, m_chunk_size, MEM_RELEASE);
#else
munmap((void*)chunk, m_chunk_size);
#endif
} else {
kfree_sized((void*)chunk, m_chunk_size);
}
@ -105,11 +117,18 @@ protected:
if constexpr (use_mmap) {
#ifdef AK_OS_SERENITY
new_chunk = serenity_mmap(nullptr, m_chunk_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_RANDOMIZED | MAP_PRIVATE, 0, 0, m_chunk_size, "BumpAllocator Chunk");
#elif defined(AK_OS_WINDOWS)
new_chunk = VirtualAlloc(NULL, m_chunk_size, MEM_COMMIT, PAGE_READWRITE);
#else
new_chunk = mmap(nullptr, m_chunk_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
#endif
#if defined(AK_OS_WINDOWS)
if (new_chunk == NULL)
return false;
#else
if (new_chunk == MAP_FAILED)
return false;
#endif
} else {
new_chunk = kmalloc(m_chunk_size);
if (!new_chunk)