diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_create.c')
-rw-r--r-- | lib/libc_r/uthread/uthread_create.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/lib/libc_r/uthread/uthread_create.c b/lib/libc_r/uthread/uthread_create.c deleted file mode 100644 index 3474bfa..0000000 --- a/lib/libc_r/uthread/uthread_create.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Copyright (c) 1995-1998 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. 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 AUTHOR 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. - * - * $FreeBSD$ - */ -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <unistd.h> -#include <stddef.h> -#include <sys/time.h> -#include <machine/reg.h> -#include "namespace.h" -#include <pthread.h> -#include "un-namespace.h" - -#include "pthread_private.h" -#include "libc_private.h" - -static u_int64_t next_uniqueid = 1; - -#define OFF(f) offsetof(struct pthread, f) -int _thread_next_offset = OFF(tle.tqe_next); -int _thread_uniqueid_offset = OFF(uniqueid); -int _thread_state_offset = OFF(state); -int _thread_name_offset = OFF(name); -int _thread_ctx_offset = OFF(ctx); -#undef OFF - -int _thread_PS_RUNNING_value = PS_RUNNING; -int _thread_PS_DEAD_value = PS_DEAD; - -__weak_reference(_pthread_create, pthread_create); - -int -_pthread_create(pthread_t *thread, const pthread_attr_t *attr, - void *(*start_routine) (void *), void *arg) -{ - struct pthread *curthread = _get_curthread(); - struct itimerval itimer; - int f_gc = 0; - int ret = 0; - pthread_t gc_thread; - pthread_t new_thread; - pthread_attr_t pattr; - void *stack; -#if !defined(__ia64__) - u_long stackp; -#endif - - if (thread == NULL) - return(EINVAL); - - /* - * Locking functions in libc are required when there are - * threads other than the initial thread. - */ - __isthreaded = 1; - - /* Allocate memory for the thread structure: */ - if ((new_thread = (pthread_t) malloc(sizeof(struct pthread))) == NULL) { - /* Insufficient memory to create a thread: */ - ret = EAGAIN; - } else { - /* Check if default thread attributes are required: */ - if (attr == NULL || *attr == NULL) { - /* Use the default thread attributes: */ - pattr = &_pthread_attr_default; - } else { - pattr = *attr; - } - /* Check if a stack was specified in the thread attributes: */ - if ((stack = pattr->stackaddr_attr) != NULL) { - } - /* Allocate a stack: */ - else { - stack = _thread_stack_alloc(pattr->stacksize_attr, - pattr->guardsize_attr); - if (stack == NULL) { - ret = EAGAIN; - free(new_thread); - } - } - - /* Check for errors: */ - if (ret != 0) { - } else { - /* Initialise the thread structure: */ - memset(new_thread, 0, sizeof(struct pthread)); - new_thread->slice_usec = -1; - new_thread->stack = stack; - new_thread->start_routine = start_routine; - new_thread->arg = arg; - - new_thread->cancelflags = PTHREAD_CANCEL_ENABLE | - PTHREAD_CANCEL_DEFERRED; - - /* - * Write a magic value to the thread structure - * to help identify valid ones: - */ - new_thread->magic = PTHREAD_MAGIC; - - /* Initialise the thread for signals: */ - new_thread->sigmask = curthread->sigmask; - new_thread->sigmask_seqno = 0; - - /* Initialize the signal frame: */ - new_thread->curframe = NULL; - - /* Initialise the jump buffer: */ - _setjmp(new_thread->ctx.jb); - - /* - * Set up new stack frame so that it looks like it - * returned from a longjmp() to the beginning of - * _thread_start(). - */ - SET_RETURN_ADDR_JB(new_thread->ctx.jb, _thread_start); - -#if !defined(__ia64__) - stackp = (long)new_thread->stack + pattr->stacksize_attr - sizeof(double); -#if defined(__amd64__) - stackp &= ~0xFUL; -#endif - /* The stack starts high and builds down: */ - SET_STACK_JB(new_thread->ctx.jb, stackp); -#else - SET_STACK_JB(new_thread->ctx.jb, - (long)new_thread->stack, pattr->stacksize_attr); -#endif - - /* Copy the thread attributes: */ - memcpy(&new_thread->attr, pattr, sizeof(struct pthread_attr)); - - /* - * Check if this thread is to inherit the scheduling - * attributes from its parent: - */ - if (new_thread->attr.flags & PTHREAD_INHERIT_SCHED) { - /* Copy the scheduling attributes: */ - new_thread->base_priority = - curthread->base_priority & - ~PTHREAD_SIGNAL_PRIORITY; - new_thread->attr.prio = - curthread->base_priority & - ~PTHREAD_SIGNAL_PRIORITY; - new_thread->attr.sched_policy = - curthread->attr.sched_policy; - } else { - /* - * Use just the thread priority, leaving the - * other scheduling attributes as their - * default values: - */ - new_thread->base_priority = - new_thread->attr.prio; - } - new_thread->active_priority = new_thread->base_priority; - new_thread->inherited_priority = 0; - - /* Initialize joiner to NULL (no joiner): */ - new_thread->joiner = NULL; - - /* Initialize the mutex queue: */ - TAILQ_INIT(&new_thread->mutexq); - - /* Initialise hooks in the thread structure: */ - new_thread->specific = NULL; - new_thread->cleanup = NULL; - new_thread->flags = 0; - new_thread->poll_data.nfds = 0; - new_thread->poll_data.fds = NULL; - new_thread->continuation = NULL; - - /* - * Defer signals to protect the scheduling queues - * from access by the signal handler: - */ - _thread_kern_sig_defer(); - - /* - * Initialise the unique id which GDB uses to - * track threads. - */ - new_thread->uniqueid = next_uniqueid++; - - /* - * Check if the garbage collector thread - * needs to be started. - */ - f_gc = (TAILQ_FIRST(&_thread_list) == _thread_initial); - - /* Add the thread to the linked list of all threads: */ - TAILQ_INSERT_HEAD(&_thread_list, new_thread, tle); - - if (pattr->suspend == PTHREAD_CREATE_SUSPENDED) { - new_thread->flags |= PTHREAD_FLAGS_SUSPENDED; - new_thread->state = PS_SUSPENDED; - } else { - new_thread->state = PS_RUNNING; - PTHREAD_PRIOQ_INSERT_TAIL(new_thread); - } - - /* - * Undefer and handle pending signals, yielding - * if necessary. - */ - _thread_kern_sig_undefer(); - - /* Return a pointer to the thread structure: */ - (*thread) = new_thread; - - if (f_gc != 0) { - /* Install the scheduling timer: */ - itimer.it_interval.tv_sec = 0; - itimer.it_interval.tv_usec = _clock_res_usec; - itimer.it_value = itimer.it_interval; - if (setitimer(_ITIMER_SCHED_TIMER, &itimer, - NULL) != 0) - PANIC("Cannot set interval timer"); - } - - /* Schedule the new user thread: */ - _thread_kern_sched(NULL); - - /* - * Start a garbage collector thread - * if necessary. - */ - if (f_gc && _pthread_create(&gc_thread, NULL, - _thread_gc, NULL) != 0) - PANIC("Can't create gc thread"); - - } - } - - /* Return the status: */ - return (ret); -} - -void -_thread_start(void) -{ - struct pthread *curthread = _get_curthread(); - - /* We just left the scheduler via longjmp: */ - _thread_kern_in_sched = 0; - - /* Run the current thread's start routine with argument: */ - _pthread_exit(curthread->start_routine(curthread->arg)); - - /* This point should never be reached. */ - PANIC("Thread has resumed after exit"); -} |