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Diffstat (limited to 'mit-pthreads/pthreads/pthread_init.c')
| -rw-r--r-- | mit-pthreads/pthreads/pthread_init.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/mit-pthreads/pthreads/pthread_init.c b/mit-pthreads/pthreads/pthread_init.c new file mode 100644 index 00000000000..83e19fe0229 --- /dev/null +++ b/mit-pthreads/pthreads/pthread_init.c @@ -0,0 +1,135 @@ +/* ==== pthread_init.c ======================================================== + * Copyright (c) 1993, 1994 by Chris Provenzano, proven@mit.edu + * 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 Chris Provenzano. + * 4. The name of Chris Provenzano may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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. + * + * Description : Pthread_init routine. + * + * 1.00 94/09/20 proven + * -Started coding this file. + */ + +#ifndef lint +static const char rcsid[] = "$Id$"; +#endif + +#include <pthread.h> +#include <stdlib.h> +#include <string.h> + +/* + * errno is declared here to prevent the linker from pulling in errno + * from the C library (and whatever else is in that file). I also use + * errno as the default location for error numbers for the initial thread + * giving some backwards compatibility. + */ +#ifdef errno +#undef errno +#endif + +#if !defined(M_UNIX) +int errno; +#else +extern int errno; +#endif + +/* ========================================================================== + * pthread_init() + * + * We use features of the C++ linker to make sure this function is called + * before anything else is done in the program. See init.cc. + */ +void pthread_init(void) +{ + struct machdep_pthread machdep_data = MACHDEP_PTHREAD_INIT; + + /* Only call this once */ + if (pthread_initial) { + return; + } + + pthread_pagesize = getpagesize(); + + /* Initialize the first thread */ + if ((pthread_initial = (pthread_t)malloc(sizeof(struct pthread))) && + (pthread_current_prio_queue = (struct pthread_prio_queue *) + malloc(sizeof(struct pthread_prio_queue)))) { + memcpy(&(pthread_initial->machdep_data), &machdep_data, + sizeof(machdep_data)); + memcpy(&pthread_initial->attr, &pthread_attr_default, + sizeof(pthread_attr_t)); + + pthread_initial->pthread_priority = PTHREAD_DEFAULT_PRIORITY; + pthread_initial->state = PS_RUNNING; + + pthread_queue_init(&(pthread_initial->join_queue)); + pthread_initial->specific_data = NULL; + pthread_initial->specific_data_count = 0; + pthread_initial->cleanup = NULL; + pthread_initial->queue = NULL; + pthread_initial->next = NULL; + pthread_initial->flags = 0; + pthread_initial->pll = NULL; + pthread_initial->sll = NULL; + + /* PTHREADS spec says we start with cancellability on and deferred */ + SET_PF_CANCEL_STATE(pthread_initial, PTHREAD_CANCEL_ENABLE); + SET_PF_CANCEL_TYPE(pthread_initial, PTHREAD_CANCEL_DEFERRED); + + + /* Ugly errno hack */ + pthread_initial->error_p = &errno; + pthread_initial->error = 0; + + pthread_prio_queue_init(pthread_current_prio_queue); + pthread_link_list = pthread_initial; + pthread_run = pthread_initial; + + uthread_sigmask = &(pthread_run->sigmask); + + /* XXX can I assume the mask and pending siganl sets are empty. */ + sigemptyset(&(pthread_initial->sigpending)); + sigemptyset(&(pthread_initial->sigmask)); + pthread_initial->sigcount = 0; + + /* Initialize the signal handler. */ + sig_init(); + + /* Initialize the fd table. */ + fd_init(); + + /* Start the scheduler */ + machdep_set_thread_timer(&(pthread_run->machdep_data)); +#ifdef M_UNIX + machdep_sys_init(); +#endif + return; + } + PANIC(); +} |