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Inline heap_allocator resize logic on *nix platforms

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This commit is contained in:
gingerBill
2021-08-07 15:05:46 +01:00
parent 5453e92bcb
commit 16eeae36d7
4 changed files with 88 additions and 61 deletions
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src/gb/gb.h
+41 -15
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@@ -5014,8 +5014,9 @@ GB_ALLOCATOR_PROC(gb_heap_allocator_proc) {
#if defined(GB_COMPILER_MSVC)
case gbAllocation_Alloc:
ptr = _aligned_malloc(size, alignment);
if (flags & gbAllocatorFlag_ClearToZero)
if (flags & gbAllocatorFlag_ClearToZero) {
gb_zero_size(ptr, size);
}
break;
case gbAllocation_Free:
_aligned_free(old_memory);
@@ -5028,29 +5029,37 @@ GB_ALLOCATOR_PROC(gb_heap_allocator_proc) {
// TODO(bill): *nix version that's decent
case gbAllocation_Alloc: {
ptr = aligned_alloc(alignment, (size + alignment - 1) & ~(alignment - 1));
// ptr = malloc(size+alignment);
if (flags & gbAllocatorFlag_ClearToZero) {
gb_zero_size(ptr, size);
}
gb_zero_size(ptr, size);
} break;
case gbAllocation_Free: {
free(old_memory);
} break;
case gbAllocation_Resize: {
// ptr = realloc(old_memory, size);
ptr = gb_default_resize_align(gb_heap_allocator(), old_memory, old_size, size, alignment);
} break;
case gbAllocation_Resize:
if (new_size == 0) {
free(old_memory);
break;
}
if (!old_memory) {
ptr = aligned_alloc(alignment, (size + alignment - 1) & ~(alignment - 1));
gb_zero_size(ptr, size);
break;
}
if (new_size <= old_size) {
ptr = old_memory;
break;
}
ptr = aligned_alloc(alignment, (size + alignment - 1) & ~(alignment - 1));
gb_memmove(ptr, old_memory, old_size);
gb_zero_size(cast(u8 *)ptr + old_size, gb_max(new_size-old_size, 0));
break;
#else
// TODO(bill): *nix version that's decent
case gbAllocation_Alloc: {
posix_memalign(&ptr, alignment, size);
if (flags & gbAllocatorFlag_ClearToZero) {
gb_zero_size(ptr, size);
}
gb_zero_size(ptr, size);
} break;
case gbAllocation_Free: {
@@ -5058,7 +5067,24 @@ GB_ALLOCATOR_PROC(gb_heap_allocator_proc) {
} break;
case gbAllocation_Resize: {
ptr = gb_default_resize_align(gb_heap_allocator(), old_memory, old_size, size, alignment);
if (new_size == 0) {
free(old_memory);
break;
}
if (!old_memory) {
posix_memalign(&ptr, alignment, size);
gb_zero_size(ptr, size);
break;
}
if (new_size <= old_size) {
ptr = old_memory;
break;
}
posix_memalign(&ptr, alignment, size);
gb_memmove(ptr, old_memory, old_size);
gb_zero_size(cast(u8 *)ptr + old_size, gb_max(new_size-old_size, 0));
} break;
#endif