making opt-in device debug allocator

src/soft/SoftDevice.zig

@@ -2,8 +2,7 @@ const std = @import("std");
 const vk = @import("vulkan");
 const base = @import("base");
 const builtin = @import("builtin");
-
-const Debug = std.builtin.OptimizeMode.Debug;
+const config = @import("config");
 
 const SoftQueue = @import("SoftQueue.zig");
 const Blitter = @import("device/Blitter.zig");
@@ -37,7 +36,7 @@ pub const Interface = base.Device;
 const SpawnError = std.Thread.SpawnError;
 
 interface: Interface,
-device_allocator: if (builtin.mode == Debug) std.heap.DebugAllocator(.{}) else std.heap.ThreadSafeAllocator,
+device_allocator: if (config.debug_allocator) std.heap.DebugAllocator(.{}) else std.heap.ThreadSafeAllocator,
 workers: std.Thread.Pool,
 blitter: Blitter,
 
@@ -78,7 +77,7 @@ pub fn create(physical_device: *base.PhysicalDevice, allocator: std.mem.Allocato
 
     self.* = .{
         .interface = interface,
-        .device_allocator = if (builtin.mode == Debug) .init else .{ .child_allocator = std.heap.c_allocator }, // TODO: better device allocator
+        .device_allocator = if (config.debug_allocator) .init else .{ .child_allocator = std.heap.c_allocator }, // TODO: better device allocator
         .workers = undefined,
         .blitter = .init,
     };
@@ -96,7 +95,7 @@ pub fn destroy(interface: *Interface, allocator: std.mem.Allocator) VkError!void
     const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
     self.workers.deinit();
 
-    if (builtin.mode == Debug) {
+    if (config.debug_allocator) {
         // All device memory allocations should've been freed by now
         if (!self.device_allocator.detectLeaks()) {
             std.log.scoped(.vkDestroyDevice).debug("No device memory leaks detected", .{});