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gpu: enable void callback contexts

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-03-19 00:41:00 -07:00 • committed by Stephen Gutekanst
parent 1717c684de
commit 79d27b82be
9 changed files with 46 additions and 48 deletions
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15
gpu/src/Adapter.zig
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@ -159,17 +159,17 @@ pub const RequestDeviceCallback = struct {
pub fn init(
comptime Context: type,
ctx: *Context,
comptime callback: fn (ctx: *Context, response: RequestDeviceResponse) void,
ctx: Context,
comptime callback: fn (ctx: Context, response: RequestDeviceResponse) void,
) RequestDeviceCallback {
const erased = (struct {
pub inline fn erased(type_erased_ctx: *anyopaque, response: RequestDeviceResponse) void {
callback(@ptrCast(*Context, @alignCast(@alignOf(*Context), type_erased_ctx)), response);
callback(if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), type_erased_ctx)), response);
}
}).erased;
return .{
.type_erased_ctx = ctx,
.type_erased_ctx = if (Context == void) undefined else ctx,
.type_erased_callback = erased,
};
}
@ -177,10 +177,9 @@ pub const RequestDeviceCallback = struct {
/// A helper which invokes requestDevice and blocks until the device is recieved.
pub fn waitForDevice(adapter: Adapter, descriptor: *const Device.Descriptor) RequestDeviceResponse {
const Context = RequestDeviceResponse;
var response: Context = undefined;
var callback = RequestDeviceCallback.init(Context, &response, (struct {
pub fn callback(ctx: *Context, callback_response: RequestDeviceResponse) void {
var response: RequestDeviceResponse = undefined;
var callback = RequestDeviceCallback.init(*RequestDeviceResponse, &response, (struct {
pub fn callback(ctx: *RequestDeviceResponse, callback_response: RequestDeviceResponse) void {
ctx.* = callback_response;
}
}).callback);