--- /dev/null 2019-02-13 16:01:02.292000000 +0300 +++ new/src/os/posix/vm/semaphore_posix.cpp 2019-02-15 19:02:54.674231125 +0300 @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include "precompiled/precompiled.hpp" +#ifndef __APPLE__ +#include "runtime/os.hpp" +// POSIX unamed semaphores are not supported on OS X. +#include "semaphore_posix.hpp" +#include + +#define check_with_errno(check_type, cond, msg) \ + do { \ + int err = errno; \ + check_type(cond, /*"%s; error='%s' (errno=%s)", */msg/*, os::strerror(err),*/ \ + /*os::errno_name(err)*/); \ +} while (false) + +#define assert_with_errno(cond, msg) check_with_errno(assert, cond, msg) +#define guarantee_with_errno(cond, msg) check_with_errno(guarantee, cond, msg) + +PosixSemaphore::PosixSemaphore(uint value) { + int ret = sem_init(&_semaphore, 0, value); + + guarantee_with_errno(ret == 0, "Failed to initialize semaphore"); +} + +PosixSemaphore::~PosixSemaphore() { + sem_destroy(&_semaphore); +} + +void PosixSemaphore::signal(uint count) { + for (uint i = 0; i < count; i++) { + int ret = sem_post(&_semaphore); + + assert_with_errno(ret == 0, "sem_post failed"); + } +} + +void PosixSemaphore::wait() { + int ret; + + do { + ret = sem_wait(&_semaphore); + } while (ret != 0 && errno == EINTR); + + assert_with_errno(ret == 0, "sem_wait failed"); +} + +bool PosixSemaphore::trywait() { + int ret; + + do { + ret = sem_trywait(&_semaphore); + } while (ret != 0 && errno == EINTR); + + assert_with_errno(ret == 0 || errno == EAGAIN, "trywait failed"); + + return ret == 0; +} + +bool PosixSemaphore::timedwait(struct timespec ts) { + while (true) { + int result = sem_timedwait(&_semaphore, &ts); + if (result == 0) { + return true; + } else if (errno == EINTR) { + continue; + } else if (errno == ETIMEDOUT) { + return false; + } else { + assert_with_errno(false, "timedwait failed"); + return false; + } + } +} +#endif // __APPLE__ +