blob: 8aab5b3de86b58eaa45cc48d4d0d8a5e97cac919 [file] [log] [blame]
/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/gpu/mtl/GrMtlSemaphore.h"
#include "src/gpu/mtl/GrMtlGpu.h"
#if !__has_feature(objc_arc)
#error This file must be compiled with Arc. Use -fobjc-arc flag
#endif
GR_NORETAIN_BEGIN
std::unique_ptr<GrMtlSemaphore> GrMtlSemaphore::Make(GrMtlGpu* gpu) {
if (@available(macOS 10.14, iOS 12.0, *)) {
id<MTLEvent> event = [gpu->device() newEvent];
uint64_t value = 1; // seems like a reasonable starting point
return std::unique_ptr<GrMtlSemaphore>(new GrMtlSemaphore(event, value));
} else {
return nullptr;
}
}
std::unique_ptr<GrMtlSemaphore> GrMtlSemaphore::MakeWrapped(GrMTLHandle event,
uint64_t value) {
// The GrMtlSemaphore will have strong ownership at this point.
// The GrMTLHandle will subsequently only have weak ownership.
if (@available(macOS 10.14, iOS 12.0, *)) {
id<MTLEvent> mtlEvent = (__bridge_transfer id<MTLEvent>)event;
return std::unique_ptr<GrMtlSemaphore>(new GrMtlSemaphore(mtlEvent, value));
} else {
return nullptr;
}
}
GrMtlSemaphore::GrMtlSemaphore(id<MTLEvent> event, uint64_t value)
: fEvent(event), fValue(value) {
}
GrBackendSemaphore GrMtlSemaphore::backendSemaphore() const {
GrBackendSemaphore backendSemaphore;
// The GrMtlSemaphore and the GrBackendSemaphore will have strong ownership at this point.
// Whoever uses the GrBackendSemaphore will subsquently steal this ref (see MakeWrapped, above).
if (@available(macOS 10.14, iOS 12.0, *)) {
GrMTLHandle handle = (__bridge_retained GrMTLHandle)(fEvent);
backendSemaphore.initMetal(handle, fValue);
}
return backendSemaphore;
}
GR_NORETAIN_END