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Diffstat (limited to 'lib/libpthread/thread/thr_create.c')
-rw-r--r--lib/libpthread/thread/thr_create.c348
1 files changed, 0 insertions, 348 deletions
diff --git a/lib/libpthread/thread/thr_create.c b/lib/libpthread/thread/thr_create.c
deleted file mode 100644
index b8a1c466b978..000000000000
--- a/lib/libpthread/thread/thr_create.c
+++ /dev/null
@@ -1,348 +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. 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 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 <sys/param.h>
-#include <sys/mman.h>
-#ifdef _THREAD_SAFE
-#include <machine/reg.h>
-#include <pthread.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_sig_saved_offset = OFF(sig_saved);
-int _thread_saved_sigcontext_offset = OFF(saved_sigcontext);
-int _thread_saved_jmp_buf_offset = OFF(saved_jmp_buf);
-#undef OFF
-
-int _thread_PS_RUNNING_value = PS_RUNNING;
-int _thread_PS_DEAD_value = PS_DEAD;
-
-int
-pthread_create(pthread_t * thread, const pthread_attr_t * attr,
- void *(*start_routine) (void *), void *arg)
-{
- int f_gc = 0;
- int ret = 0;
- pthread_t gc_thread;
- pthread_t new_thread;
- pthread_attr_t pattr;
- void *stack;
-
- /*
- * 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 memory for a default-size stack: */
- else if (pattr->stacksize_attr == PTHREAD_STACK_DEFAULT) {
- struct stack *spare_stack;
-
- /* Allocate or re-use a default-size stack. */
-
- /*
- * Use the garbage collector mutex for synchronization
- * of the spare stack list.
- */
- if (pthread_mutex_lock(&_gc_mutex) != 0)
- PANIC("Cannot lock gc mutex");
-
- if ((spare_stack = SLIST_FIRST(&_stackq)) != NULL) {
- /* Use the spare stack. */
- SLIST_REMOVE_HEAD(&_stackq, qe);
-
- /* Unlock the garbage collector mutex. */
- if (pthread_mutex_unlock(&_gc_mutex) != 0)
- PANIC("Cannot unlock gc mutex");
-
- stack = sizeof(struct stack)
- + (void *) spare_stack
- - PTHREAD_STACK_DEFAULT;
- } else {
- /* Allocate a new stack. */
- stack = _next_stack + PTHREAD_STACK_GUARD;
-
- /*
- * Even if stack allocation fails, we don't want
- * to try to use this location again, so
- * unconditionally decrement _next_stack. Under
- * normal operating conditions, the most likely
- * reason for an mmap() error is a stack
- * overflow of the adjacent thread stack.
- */
- _next_stack -= (PTHREAD_STACK_DEFAULT
- + PTHREAD_STACK_GUARD);
-
- /* Unlock the garbage collector mutex. */
- if (pthread_mutex_unlock(&_gc_mutex) != 0)
- PANIC("Cannot unlock gc mutex");
-
- /* Stack: */
- if (mmap(stack, PTHREAD_STACK_DEFAULT,
- PROT_READ | PROT_WRITE, MAP_STACK,
- -1, 0) == MAP_FAILED) {
- ret = EAGAIN;
- free(new_thread);
- }
- }
- }
- /*
- * The user wants a stack of a particular size. Lets hope they
- * really know what they want, and simply malloc the stack.
- */
- else if ((stack = (void *) malloc(pattr->stacksize_attr))
- == NULL) {
- /* Insufficient memory to create a thread: */
- 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->sig_saved = 0;
- 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 = _thread_run->sigmask;
-
- /* Initialise the jump buffer: */
- setjmp(new_thread->saved_jmp_buf);
-
- /*
- * Set up new stack frame so that it looks like it
- * returned from a longjmp() to the beginning of
- * _thread_start().
- */
-#if defined(__FreeBSD__)
-#if defined(__alpha__)
- new_thread->saved_jmp_buf[0]._jb[2] =
- (long)_thread_start;
- new_thread->saved_jmp_buf[0]._jb[4 + R_RA] =
- 0;
- new_thread->saved_jmp_buf[0]._jb[4 + R_T12] =
- (long)_thread_start;
-#else
- new_thread->saved_jmp_buf[0]._jb[0] =
- (long)_thread_start;
-#endif
-#elif defined(__NetBSD__)
-#if defined(__alpha__)
- new_thread->saved_jmp_buf[2] = (long)_thread_start;
- new_thread->saved_jmp_buf[4 + R_RA] = 0;
- new_thread->saved_jmp_buf[4 + R_T12] =
- (long)_thread_start;
-#else
- new_thread->saved_jmp_buf[0] = (long)_thread_start;
-#endif
-#else
-#error "Don't recognize this operating system!"
-#endif
-
- /* The stack starts high and builds down: */
-#if defined(__FreeBSD__)
-#if defined(__alpha__)
- new_thread->saved_jmp_buf[0]._jb[4 + R_SP] =
- (long)new_thread->stack + pattr->stacksize_attr
- - sizeof(double);
-#else
- new_thread->saved_jmp_buf[0]._jb[2] =
- (int)(new_thread->stack + pattr->stacksize_attr -
- sizeof(double));
-#endif
-#elif defined(__NetBSD__)
-#if defined(__alpha__)
- new_thread->saved_jmp_buf[4 + R_SP] =
- (long)new_thread->stack + pattr->stacksize_attr -
- sizeof(double);
-#else
- new_thread->saved_jmp_buf[2] = (long)new_thread->stack
- + pattr->stacksize_attr - sizeof(double);
-#endif
-#else
-#error "Don't recognize this operating system!"
-#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
- = _thread_run->base_priority;
- new_thread->attr.prio
- = _thread_run->base_priority;
- new_thread->attr.sched_policy
- = _thread_run->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;
-
- /* Initialise the join queue for the new thread: */
- TAILQ_INIT(&(new_thread->join_queue));
-
- /* Initialize the mutex queue: */
- TAILQ_INIT(&new_thread->mutexq);
-
- /* Initialise hooks in the thread structure: */
- new_thread->specific_data = NULL;
- new_thread->cleanup = NULL;
- new_thread->flags = 0;
- new_thread->poll_data.nfds = 0;
- new_thread->poll_data.fds = NULL;
- new_thread->jmpflags = 0;
- 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->state = PS_SUSPENDED;
- PTHREAD_WAITQ_INSERT(new_thread);
- } 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;
-
- /* 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)
-{
- /* We just left the scheduler via longjmp: */
- _thread_kern_in_sched = 0;
-
- /* Run the current thread's start routine with argument: */
- pthread_exit(_thread_run->start_routine(_thread_run->arg));
-
- /* This point should never be reached. */
- PANIC("Thread has resumed after exit");
-}
-#endif
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