1 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #ifndef VK_FENCE_HPP_
16 #define VK_FENCE_HPP_
17
18 #include "VkObject.hpp"
19 #include "System/Synchronization.hpp"
20
21 #include "marl/containers.h"
22 #include "marl/event.h"
23 #include "marl/waitgroup.h"
24
25 namespace vk {
26
27 class Fence : public Object<Fence, VkFence>, public sw::TaskEvents
28 {
29 public:
Fence(const VkFenceCreateInfo * pCreateInfo,void * mem)30 Fence(const VkFenceCreateInfo *pCreateInfo, void *mem)
31 : event(marl::Event::Mode::Manual, (pCreateInfo->flags & VK_FENCE_CREATE_SIGNALED_BIT) != 0)
32 {}
33
ComputeRequiredAllocationSize(const VkFenceCreateInfo * pCreateInfo)34 static size_t ComputeRequiredAllocationSize(const VkFenceCreateInfo *pCreateInfo)
35 {
36 return 0;
37 }
38
reset()39 void reset()
40 {
41 event.clear();
42 }
43
getStatus()44 VkResult getStatus()
45 {
46 return event.isSignalled() ? VK_SUCCESS : VK_NOT_READY;
47 }
48
wait()49 VkResult wait()
50 {
51 event.wait();
52 return VK_SUCCESS;
53 }
54
55 template<class CLOCK, class DURATION>
wait(const std::chrono::time_point<CLOCK,DURATION> & timeout)56 VkResult wait(const std::chrono::time_point<CLOCK, DURATION> &timeout)
57 {
58 return event.wait_until(timeout) ? VK_SUCCESS : VK_TIMEOUT;
59 }
60
getEvent() const61 const marl::Event &getEvent() const { return event; }
62
63 // TaskEvents compliance
start()64 void start() override
65 {
66 ASSERT(!event.isSignalled());
67 wg.add();
68 }
69
finish()70 void finish() override
71 {
72 ASSERT(!event.isSignalled());
73 if(wg.done())
74 {
75 event.signal();
76 }
77 }
78
79 private:
80 Fence(const Fence &) = delete;
81
82 marl::WaitGroup wg;
83 const marl::Event event;
84 };
85
Cast(VkFence object)86 static inline Fence *Cast(VkFence object)
87 {
88 return Fence::Cast(object);
89 }
90
91 } // namespace vk
92
93 #endif // VK_FENCE_HPP_
94