jdk8-mips64-public/hotspot: src/os/bsd/vm/semaphore

8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

     1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled/precompiled.hpp"

    26 #include "semaphore_bsd.hpp"

    27 #include "utilities/debug.hpp"

    29 #include <semaphore.h>

    31 #ifdef __APPLE__

    32 // OS X doesn't support unamed POSIX semaphores, so the implementation in os_posix.cpp can't be used.

    34 static const char* sem_init_strerror(kern_return_t value) {

    35   switch (value) {

    36     case KERN_INVALID_ARGUMENT:  return "Invalid argument";

    37     case KERN_RESOURCE_SHORTAGE: return "Resource shortage";

    38     default:                     return "Unknown";

    39   }

    40 }

    42 OSXSemaphore::OSXSemaphore(uint value) {

    43   kern_return_t ret = semaphore_create(mach_task_self(), &_semaphore, SYNC_POLICY_FIFO, value);

    45   guarantee(ret == KERN_SUCCESS, err_msg("Failed to create semaphore: %s", sem_init_strerror(ret)));

    46 }

    48 OSXSemaphore::~OSXSemaphore() {

    49   semaphore_destroy(mach_task_self(), _semaphore);

    50 }

    52 void OSXSemaphore::signal(uint count) {

    53   for (uint i = 0; i < count; i++) {

    54     kern_return_t ret = semaphore_signal(_semaphore);

    56     assert(ret == KERN_SUCCESS, "Failed to signal semaphore");

    57   }

    58 }

    60 void OSXSemaphore::wait() {

    61   kern_return_t ret;

    62   while ((ret = semaphore_wait(_semaphore)) == KERN_ABORTED) {

    63     // Semaphore was interrupted. Retry.

    64   }

    65   assert(ret == KERN_SUCCESS, "Failed to wait on semaphore");

    66 }

    68 int64_t OSXSemaphore::currenttime() {

    69   struct timeval tv;

    70   gettimeofday(&tv, NULL);

    71   return (tv.tv_sec * NANOSECS_PER_SEC) + (tv.tv_usec * 1000);

    72 }

    74 bool OSXSemaphore::trywait() {

    75   return timedwait(0, 0);

    76 }

    78 bool OSXSemaphore::timedwait(unsigned int sec, int nsec) {

    79   kern_return_t kr = KERN_ABORTED;

    80   mach_timespec_t waitspec;

    81   waitspec.tv_sec = sec;

    82   waitspec.tv_nsec = nsec;

    84   int64_t starttime = currenttime();

    86   kr = semaphore_timedwait(_semaphore, waitspec);

    87   while (kr == KERN_ABORTED) {

    88     int64_t totalwait = (sec * NANOSECS_PER_SEC) + nsec;

    90     int64_t current = currenttime();

    91     int64_t passedtime = current - starttime;

    93     if (passedtime >= totalwait) {

    94       waitspec.tv_sec = 0;

    95       waitspec.tv_nsec = 0;

    96     } else {

    97       int64_t waittime = totalwait - (current - starttime);

    98       waitspec.tv_sec = waittime / NANOSECS_PER_SEC;

    99       waitspec.tv_nsec = waittime % NANOSECS_PER_SEC;

   100     }

   102     kr = semaphore_timedwait(_semaphore, waitspec);

   103   }

   105   return kr == KERN_SUCCESS;

   106 }

   107 #endif // __APPLE__

src/os/bsd/vm/semaphore_bsd.cpp@b985cbb00e68

src/os/bsd/vm/semaphore_bsd.cpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/os/bsd/vm/semaphore_bsd.cpp@b985cbb00e68

src/os/bsd/vm/semaphore_bsd.cpp