Add Allocator_Mode.Alloc_Non_Zerored

core/os/os.odin

@@ -178,7 +178,7 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
 	// the pointer we return to the user.
 	//
 
-	aligned_alloc :: proc(size, alignment: int, old_ptr: rawptr = nil) -> ([]byte, mem.Allocator_Error) {
+	aligned_alloc :: proc(size, alignment: int, old_ptr: rawptr = nil, zero_memory := true) -> ([]byte, mem.Allocator_Error) {
 		a := max(alignment, align_of(rawptr))
 		space := size + a - 1
 
@@ -187,7 +187,7 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
 			original_old_ptr := mem.ptr_offset((^rawptr)(old_ptr), -1)^
 			allocated_mem = heap_resize(original_old_ptr, space+size_of(rawptr))
 		} else {
-			allocated_mem = heap_alloc(space+size_of(rawptr))
+			allocated_mem = heap_alloc(space+size_of(rawptr), zero_memory)
 		}
 		aligned_mem := rawptr(mem.ptr_offset((^u8)(allocated_mem), size_of(rawptr)))
 
@@ -226,8 +226,8 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
 	}
 
 	switch mode {
-	case .Alloc:
-		return aligned_alloc(size, alignment)
+	case .Alloc, .Alloc_Non_Zeroed:
+		return aligned_alloc(size, alignment, nil, mode == .Alloc)
 
 	case .Free:
 		aligned_free(old_memory)
@@ -244,7 +244,7 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
 	case .Query_Features:
 		set := (^mem.Allocator_Mode_Set)(old_memory)
 		if set != nil {
-			set^ = {.Alloc, .Free, .Resize, .Query_Features}
+			set^ = {.Alloc, .Alloc_Non_Zeroed, .Free, .Resize, .Query_Features}
 		}
 		return nil, nil
 

core/os/os_darwin.odin

@@ -625,9 +625,15 @@ access :: proc(path: string, mask: int) -> bool {
 	return _unix_access(cstr, mask) == 0
 }
 
-heap_alloc :: proc(size: int) -> rawptr {
-	assert(size > 0)
-	return _unix_calloc(1, size)
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	if size <= 0 {
+		return nil
+	}
+	if zero_memory {
+		return _unix_calloc(1, size)
+	} else {
+		return _unix_malloc(size)
+	}
 }
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
 	// NOTE: _unix_realloc doesn't guarantee new memory will be zeroed on

core/os/os_essence.odin

@@ -18,8 +18,8 @@ current_thread_id :: proc "contextless" () -> int {
 	return (int) (es.ThreadGetID(es.CURRENT_THREAD));
 }
 
-heap_alloc :: proc(size: int) -> rawptr {
-	return es.HeapAllocate(size, false);
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	return es.HeapAllocate(size, zero_memory);
 }
 
 heap_free :: proc(ptr: rawptr) {

core/os/os_freebsd.odin

@@ -603,9 +603,15 @@ access :: proc(path: string, mask: int) -> (bool, Errno) {
 	return true, ERROR_NONE
 }
 
-heap_alloc :: proc(size: int) -> rawptr {
-	assert(size >= 0)
-	return _unix_calloc(1, c.size_t(size))
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	if zero <= 0 {
+		return nil
+	}
+	if zero_memory {
+		return _unix_calloc(1, c.size_t(size))
+	} else {
+		return _unix_malloc(c.size_t(size))
+	}
 }
 
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {

core/os/os_linux.odin

@@ -755,9 +755,15 @@ access :: proc(path: string, mask: int) -> (bool, Errno) {
 	return true, ERROR_NONE
 }
 
-heap_alloc :: proc(size: int) -> rawptr {
-	assert(size >= 0)
-	return _unix_calloc(1, c.size_t(size))
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	if size <= 0 {
+		return nil
+	}
+	if zero_memory {
+		return _unix_calloc(1, c.size_t(size))
+	} else {
+		return _unix_malloc(c.size_t(size))
+	}
 }
 
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {

core/os/os_openbsd.odin

@@ -605,9 +605,15 @@ access :: proc(path: string, mask: int) -> (bool, Errno) {
 	return true, ERROR_NONE
 }
 
-heap_alloc :: proc(size: int) -> rawptr {
-	assert(size >= 0)
-	return _unix_calloc(1, c.size_t(size))
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	if size <= 0 {
+		return nil
+	}
+	if zero_memory {
+		return _unix_calloc(1, c.size_t(size))
+	} else {
+		return _unix_malloc(c.size_t(size))
+	}
 }
 
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {

core/os/os_wasi.odin

@@ -72,7 +72,7 @@ file_size :: proc(fd: Handle) -> (i64, Errno) {
 
 
 
-heap_alloc :: proc(size: int) -> rawptr {
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
 	return nil
 }
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {

core/os/os_windows.odin

@@ -91,8 +91,8 @@ last_write_time_by_name :: proc(name: string) -> (File_Time, Errno) {
 
 
 
-heap_alloc :: proc(size: int) -> rawptr {
-	return win32.HeapAlloc(win32.GetProcessHeap(), win32.HEAP_ZERO_MEMORY, uint(size))
+heap_alloc :: proc(size: int, zero_memory := true) -> rawptr {
+	return win32.HeapAlloc(win32.GetProcessHeap(), win32.HEAP_ZERO_MEMORY if zero_memory else 0, uint(size))
 }
 heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
 	if new_size == 0 {