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replace mallo with mmao

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ownedbywuigi 2025-07-08 03:59:45 +01:00
parent 121aefbde5
commit 6466c04321
1 changed files with 21 additions and 4 deletions
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25
core/memory/arena.cpp
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@ -1,17 +1,34 @@
#include "arena.h"
#include "Base/Assert.h"
#include <sys/mman.h> // Required for mmap and MAP_FAILED
// Memory::Arena Memory::arena_init() {
// // TODO(GloriousTaco): The line below is stupidly unsafe. Replace malloc with mmap() and check the return value.
// auto data =
// static_cast<uint8_t*>(malloc(sizeof(uint8_t) * MEMORY_CAPACITY));
// Memory::Arena arena = {
// .capacity = MEMORY_CAPACITY,
// .size = 0,
// .data = data,
// };
// return arena;
// }
// old unsafe code
Memory::Arena Memory::arena_init() {
// TODO(GloriousTaco): The line below is stupidly unsafe. Replace malloc with mmap() and check the return value.
auto data =
static_cast<uint8_t*>(malloc(sizeof(uint8_t) * MEMORY_CAPACITY));
void* data = mmap(nullptr, MEMORY_CAPACITY, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (data == MAP_FAILED) {
return {0, 0, nullptr}; // Return invalid arena on failure
}
Memory::Arena arena = {
.capacity = MEMORY_CAPACITY,
.size = 0,
.data = data,
.data = static_cast<uint8_t*>(data),
};
return arena;
}
// new more memsafe code (ownedbywuigi)
const uint8_t* Memory::arena_allocate(Memory::Arena* arena,
const std::size_t size) {
ASSERT(arena != nullptr);