1// Copyright 2016 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#include "Thread.hpp"
16
17namespace sw
18{
19 Thread::Thread(void (*threadFunction)(void *parameters), void *parameters)
20 {
21 Event init;
22 Entry entry = {threadFunction, parameters, &init};
23
24 #if defined(_WIN32)
25 handle = CreateThread(NULL, 1024 * 1024, startFunction, &entry, 0, NULL);
26 #else
27 pthread_create(&handle, NULL, startFunction, &entry);
28 #endif
29
30 init.wait();
31 }
32
33 Thread::~Thread()
34 {
35 join(); // Make threads exit before deleting them to not block here
36 }
37
38 void Thread::join()
39 {
40 if(!hasJoined)
41 {
42 #if defined(_WIN32)
43 WaitForSingleObject(handle, INFINITE);
44 CloseHandle(handle);
45 #else
46 pthread_join(handle, NULL);
47 #endif
48
49 hasJoined = true;
50 }
51 }
52
53 #if defined(_WIN32)
54 unsigned long __stdcall Thread::startFunction(void *parameters)
55 {
56 Entry entry = *(Entry*)parameters;
57 entry.init->signal();
58 entry.threadFunction(entry.threadParameters);
59 return 0;
60 }
61 #else
62 void *Thread::startFunction(void *parameters)
63 {
64 Entry entry = *(Entry*)parameters;
65 entry.init->signal();
66 entry.threadFunction(entry.threadParameters);
67 return nullptr;
68 }
69 #endif
70
71 Event::Event()
72 {
73 #if defined(_WIN32)
74 handle = CreateEvent(NULL, FALSE, FALSE, NULL);
75 #else
76 pthread_cond_init(&handle, NULL);
77 pthread_mutex_init(&mutex, NULL);
78 signaled = false;
79 #endif
80 }
81
82 Event::~Event()
83 {
84 #if defined(_WIN32)
85 CloseHandle(handle);
86 #else
87 pthread_cond_destroy(&handle);
88 pthread_mutex_destroy(&mutex);
89 #endif
90 }
91}
92