1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "default-platform.h"
#include <queue>
// TODO(jochen): We should have our own version of checks.h.
#include "../checks.h"
// TODO(jochen): Why is cpu.h not in platform/?
#include "../cpu.h"
#include "worker-thread.h"
namespace v8 {
namespace internal {
DefaultPlatform::DefaultPlatform()
: initialized_(false), thread_pool_size_(0) {}
DefaultPlatform::~DefaultPlatform() {
LockGuard<Mutex> guard(&lock_);
queue_.Terminate();
if (initialized_) {
for (std::vector<WorkerThread*>::iterator i = thread_pool_.begin();
i != thread_pool_.end(); ++i) {
delete *i;
}
}
}
void DefaultPlatform::SetThreadPoolSize(int thread_pool_size) {
LockGuard<Mutex> guard(&lock_);
ASSERT(thread_pool_size >= 0);
if (thread_pool_size < 1)
thread_pool_size = CPU::NumberOfProcessorsOnline();
thread_pool_size_ = Max(Min(thread_pool_size, kMaxThreadPoolSize), 1);
}
void DefaultPlatform::EnsureInitialized() {
LockGuard<Mutex> guard(&lock_);
if (initialized_) return;
initialized_ = true;
for (int i = 0; i < thread_pool_size_; ++i)
thread_pool_.push_back(new WorkerThread(&queue_));
}
void DefaultPlatform::CallOnBackgroundThread(Task *task,
ExpectedRuntime expected_runtime) {
EnsureInitialized();
queue_.Append(task);
}
void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) {
// TODO(jochen): implement.
task->Run();
delete task;
}
} } // namespace v8::internal
|
