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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <dirent.h>
#include <errno.h>
#include <iostream>
#include <signal.h>
#include <sstream>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "common/code_environment.h"
#include "common/debug.h"
#include "common/signal.h"
#include "Thread.h"
Thread::Thread()
: thread_id(0)
{
}
Thread::~Thread()
{
}
void *Thread::_entry_func(void *arg) {
void *r = ((Thread*)arg)->entry();
return r;
}
const pthread_t &Thread::get_thread_id()
{
return thread_id;
}
bool Thread::is_started()
{
return thread_id != 0;
}
bool Thread::am_self()
{
return (pthread_self() == thread_id);
}
int Thread::kill(int signal)
{
if (thread_id)
return pthread_kill(thread_id, signal);
else
return -EINVAL;
}
int Thread::try_create(size_t stacksize)
{
pthread_attr_t *thread_attr = NULL;
stacksize &= CEPH_PAGE_MASK; // must be multiple of page
if (stacksize) {
thread_attr = (pthread_attr_t*) malloc(sizeof(pthread_attr_t));
if (!thread_attr)
return -ENOMEM;
pthread_attr_init(thread_attr);
pthread_attr_setstacksize(thread_attr, stacksize);
}
int r;
// The child thread will inherit our signal mask. Set our signal mask to
// the set of signals we want to block. (It's ok to block signals more
// signals than usual for a little while-- they will just be delivered to
// another thread or delieverd to this thread later.)
sigset_t old_sigset;
if (g_code_env == CODE_ENVIRONMENT_LIBRARY) {
block_signals(NULL, &old_sigset);
}
else {
int to_block[] = { SIGPIPE , 0 };
block_signals(to_block, &old_sigset);
}
r = pthread_create(&thread_id, thread_attr, _entry_func, (void*)this);
restore_sigset(&old_sigset);
if (thread_attr)
free(thread_attr);
return r;
}
void Thread::create(size_t stacksize)
{
int ret = try_create(stacksize);
if (ret != 0) {
char buf[256];
snprintf(buf, sizeof(buf), "Thread::try_create(): pthread_create "
"failed with error %d", ret);
dout_emergency(buf);
assert(ret == 0);
}
}
int Thread::join(void **prval)
{
if (thread_id == 0) {
assert("join on thread that was never started" == 0);
return -EINVAL;
}
int status = pthread_join(thread_id, prval);
assert(status == 0);
thread_id = 0;
return status;
}
int Thread::detach()
{
return pthread_detach(thread_id);
}
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