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

src/os/bsd/vm/semaphore_bsd.cpp@b985cbb00e68 (annotated)

src/os/bsd/vm/semaphore_bsd.cpp

Mon, 12 Aug 2019 18:30:40 +0300

author: apetushkov
date: Mon, 12 Aug 2019 18:30:40 +0300
changeset 9858: b985cbb00e68
permissions: -rw-r--r--

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

 /*
  * 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"
 #include "semaphore_bsd.hpp"
 #include "utilities/debug.hpp"
 #include <semaphore.h>
 #ifdef __APPLE__
 // OS X doesn't support unamed POSIX semaphores, so the implementation in os_posix.cpp can't be used.
 static const char* sem_init_strerror(kern_return_t value) {
   switch (value) {
     case KERN_INVALID_ARGUMENT:  return "Invalid argument";
     case KERN_RESOURCE_SHORTAGE: return "Resource shortage";
     default:                     return "Unknown";
   }
 }
 OSXSemaphore::OSXSemaphore(uint value) {
   kern_return_t ret = semaphore_create(mach_task_self(), &_semaphore, SYNC_POLICY_FIFO, value);
   guarantee(ret == KERN_SUCCESS, err_msg("Failed to create semaphore: %s", sem_init_strerror(ret)));
 }
 OSXSemaphore::~OSXSemaphore() {
   semaphore_destroy(mach_task_self(), _semaphore);
 }
 void OSXSemaphore::signal(uint count) {
   for (uint i = 0; i < count; i++) {
     kern_return_t ret = semaphore_signal(_semaphore);
     assert(ret == KERN_SUCCESS, "Failed to signal semaphore");
   }
 }
 void OSXSemaphore::wait() {
   kern_return_t ret;
   while ((ret = semaphore_wait(_semaphore)) == KERN_ABORTED) {
     // Semaphore was interrupted. Retry.
   }
   assert(ret == KERN_SUCCESS, "Failed to wait on semaphore");
 }
 int64_t OSXSemaphore::currenttime() {
   struct timeval tv;
   gettimeofday(&tv, NULL);
   return (tv.tv_sec * NANOSECS_PER_SEC) + (tv.tv_usec * 1000);
 }
 bool OSXSemaphore::trywait() {
   return timedwait(0, 0);
 }
 bool OSXSemaphore::timedwait(unsigned int sec, int nsec) {
   kern_return_t kr = KERN_ABORTED;
   mach_timespec_t waitspec;
   waitspec.tv_sec = sec;
   waitspec.tv_nsec = nsec;
   int64_t starttime = currenttime();
   kr = semaphore_timedwait(_semaphore, waitspec);
   while (kr == KERN_ABORTED) {
     int64_t totalwait = (sec * NANOSECS_PER_SEC) + nsec;
     int64_t current = currenttime();
     int64_t passedtime = current - starttime;
     if (passedtime >= totalwait) {
       waitspec.tv_sec = 0;
       waitspec.tv_nsec = 0;
     } else {
       int64_t waittime = totalwait - (current - starttime);
       waitspec.tv_sec = waittime / NANOSECS_PER_SEC;
       waitspec.tv_nsec = waittime % NANOSECS_PER_SEC;
     }
     kr = semaphore_timedwait(_semaphore, waitspec);
   }
   return kr == KERN_SUCCESS;
 }
 #endif // __APPLE__

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os/bsd/vm/semaphore_bsd.cpp@b985cbb00e68 (annotated)

src/os/bsd/vm/semaphore_bsd.cpp