281de965a4
Condition variables are synchronization primitives that can be used to block one or more threads while waiting for condition to become true. Right now we have only semaphores, mutexes and atomic operations for synchronization, which results in quite complex solutions where an implementation using condition variables and mutexes would be straight forward. There's also a performance benefit to condition variables and mutexes vs semaphores, especially on Windows, where semaphores are kernel objects, while mutexes are implemented as fast critical sections, it CAN be beneficial performance-wise to use condition variables instead of semaphores. R=mstarzinger@chromium.org Review URL: https://codereview.chromium.org/23548007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16492 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Tests of the TokenLock class from lock.h
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#include <pthread.h>
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#include <stdlib.h>
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#include <unistd.h> // for usleep()
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#include "v8.h"
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#include "platform.h"
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#include "cctest.h"
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using namespace ::v8::internal;
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TEST(VirtualMemory) {
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OS::SetUp();
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VirtualMemory* vm = new VirtualMemory(1 * MB);
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CHECK(vm->IsReserved());
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void* block_addr = vm->address();
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size_t block_size = 4 * KB;
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CHECK(vm->Commit(block_addr, block_size, false));
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// Check whether we can write to memory.
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int* addr = static_cast<int*>(block_addr);
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addr[KB-1] = 2;
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CHECK(vm->Uncommit(block_addr, block_size));
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delete vm;
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}
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TEST(GetCurrentProcessId) {
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OS::SetUp();
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CHECK_EQ(static_cast<int>(getpid()), OS::GetCurrentProcessId());
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}
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