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/*
* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by John Birrell.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/* Allocate space for global thread variables here: */
#define GLOBAL_PTHREAD_PRIVATE
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#ifdef _THREAD_SAFE
#include <machine/reg.h>
#include <pthread.h>
#include "pthread_private.h"
extern int _thread_autoinit_dummy_decl;
/*
* Threaded process initialization
*/
void
_thread_init(void)
{
int flags;
int i;
struct sigaction act;
/* Ensure that the auto-initialization routine is linked in: */
_thread_autoinit_dummy_decl = 1;
/* Check if this function has already been called: */
if (_thread_initial)
/* Only initialise the threaded application once. */
return;
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
if ((_pthread_stdio_flags[i] =
_thread_sys_fcntl(i,F_GETFL, NULL)) == -1)
PANIC("Cannot get stdio flags");
/*
* Create a pipe that is written to by the signal handler to prevent
* signals being missed in calls to _thread_sys_select:
*/
if (_thread_sys_pipe(_thread_kern_pipe) != 0) {
/* Cannot create pipe, so abort: */
PANIC("Cannot create kernel pipe");
}
/* Get the flags for the read pipe: */
else if ((flags = _thread_sys_fcntl(_thread_kern_pipe[0], F_GETFL, NULL)) == -1) {
/* Abort this application: */
PANIC("Cannot get kernel read pipe flags");
}
/* Make the read pipe non-blocking: */
else if (_thread_sys_fcntl(_thread_kern_pipe[0], F_SETFL, flags | O_NONBLOCK) == -1) {
/* Abort this application: */
PANIC("Cannot make kernel read pipe non-blocking");
}
/* Get the flags for the write pipe: */
else if ((flags = _thread_sys_fcntl(_thread_kern_pipe[1], F_GETFL, NULL)) == -1) {
/* Abort this application: */
PANIC("Cannot get kernel write pipe flags");
}
/* Make the write pipe non-blocking: */
else if (_thread_sys_fcntl(_thread_kern_pipe[1], F_SETFL, flags | O_NONBLOCK) == -1) {
/* Abort this application: */
PANIC("Cannot get kernel write pipe flags");
}
/* Allocate memory for the thread structure of the initial thread: */
else if ((_thread_initial = (pthread_t) malloc(sizeof(struct pthread))) == NULL) {
/*
* Insufficient memory to initialise this application, so
* abort:
*/
PANIC("Cannot allocate memory for initial thread");
} else {
/* Zero the global kernel thread structure: */
memset(&_thread_kern_thread, 0, sizeof(struct pthread));
memset(_thread_initial, 0, sizeof(struct pthread));
/* Default the priority of the initial thread: */
_thread_initial->pthread_priority = PTHREAD_DEFAULT_PRIORITY;
/* Initialise the state of the initial thread: */
_thread_initial->state = PS_RUNNING;
/* Initialise the queue: */
_thread_queue_init(&(_thread_initial->join_queue));
/* Initialise the rest of the fields: */
_thread_initial->parent_thread = NULL;
_thread_initial->specific_data = NULL;
_thread_initial->cleanup = NULL;
_thread_initial->queue = NULL;
_thread_initial->qnxt = NULL;
_thread_initial->nxt = NULL;
_thread_initial->flags = 0;
_thread_initial->error = 0;
_thread_link_list = _thread_initial;
_thread_run = _thread_initial;
/* Enter a loop to get the existing signal status: */
for (i = 1; i < NSIG; i++) {
/* Check for signals which cannot be trapped: */
if (i == SIGKILL || i == SIGSTOP) {
}
/* Get the signal handler details: */
else if (_thread_sys_sigaction(i, NULL, &act) != 0) {
/*
* Abort this process if signal
* initialisation fails:
*/
PANIC("Cannot read signal handler info");
}
/* Set the signal handler for the initial thread: */
else if (sigaction(i, &act, NULL) != 0) {
/*
* Abort this process if signal
* initialisation fails:
*/
PANIC("Cannot initialise signal handler for initial thread");
}
}
/* Initialise the global signal action structure: */
sigfillset(&act.sa_mask);
act.sa_handler = (void (*) ()) _thread_sig_handler;
act.sa_flags = SA_RESTART;
/* Enter a loop to initialise the rest of the signals: */
for (i = 1; i < NSIG; i++) {
/* Check for signals which cannot be trapped: */
if (i == SIGKILL || i == SIGSTOP) {
}
/* Initialise the signal for default handling: */
else if (_thread_sys_sigaction(i, &act, NULL) != 0) {
/*
* Abort this process if signal
* initialisation fails:
*/
PANIC("Cannot initialise signal handler");
}
}
/* Get the table size: */
if ((_thread_dtablesize = getdtablesize()) < 0) {
/*
* Cannot get the system defined table size, so abort
* this process.
*/
PANIC("Cannot get dtablesize");
}
/* Allocate memory for the file descriptor table: */
if ((_thread_fd_table = (struct fd_table_entry **) malloc(sizeof(struct fd_table_entry) * _thread_dtablesize)) == NULL) {
/*
* Cannot allocate memory for the file descriptor
* table, so abort this process.
*/
PANIC("Cannot allocate memory for file descriptor table");
} else {
/*
* Enter a loop to initialise the file descriptor
* table:
*/
for (i = 0; i < _thread_dtablesize; i++) {
/* Initialise the file descriptor table: */
_thread_fd_table[i] = NULL;
}
}
}
return;
}
/*
* Special start up code for NetBSD/Alpha
*/
#if defined(__NetBSD__) && defined(__alpha__)
int
main(int argc, char *argv[], char *env);
int
_thread_main(int argc, char *argv[], char *env)
{
_thread_init();
return (main(argc, argv, env));
}
#endif
#else
/*
* A stub for non-threaded programs.
*/
void
_thread_init(void)
{
}
#endif
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