| /* Creating and controlling POSIX threads. |
| Copyright (C) 2010-2020 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Paul Eggert, 2010, and Bruno Haible <bruno@clisp.org>, 2019. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include <pthread.h> |
| |
| #if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS |
| # include "windows-thread.h" |
| #else |
| # include <stdlib.h> |
| #endif |
| |
| typedef void * (* pthread_main_function_t) (void *); |
| |
| #if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H |
| |
| int |
| pthread_attr_init (pthread_attr_t *attr) |
| { |
| *attr = PTHREAD_CREATE_JOINABLE; |
| return 0; |
| } |
| |
| int |
| pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstatep) |
| { |
| *detachstatep = *attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED); |
| return 0; |
| } |
| |
| int |
| pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate) |
| { |
| if (!(detachstate == PTHREAD_CREATE_JOINABLE |
| || detachstate == PTHREAD_CREATE_DETACHED)) |
| return EINVAL; |
| *attr ^= (*attr ^ detachstate) |
| & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED); |
| return 0; |
| } |
| |
| int |
| pthread_attr_destroy (pthread_attr_t *attr _GL_UNUSED) |
| { |
| return 0; |
| } |
| |
| #endif |
| |
| #if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS |
| /* Use Windows threads. */ |
| |
| int |
| pthread_create (pthread_t *threadp, const pthread_attr_t *attr, |
| pthread_main_function_t mainfunc, void *arg) |
| { |
| unsigned int glwthread_attr = |
| (attr != NULL |
| && (*attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED)) |
| != PTHREAD_CREATE_JOINABLE |
| ? GLWTHREAD_ATTR_DETACHED |
| : 0); |
| return glwthread_thread_create (threadp, glwthread_attr, mainfunc, arg); |
| } |
| |
| pthread_t |
| pthread_self (void) |
| { |
| return glwthread_thread_self (); |
| } |
| |
| int |
| pthread_equal (pthread_t thread1, pthread_t thread2) |
| { |
| return thread1 == thread2; |
| } |
| |
| int |
| pthread_detach (pthread_t thread) |
| { |
| return glwthread_thread_detach (thread); |
| } |
| |
| int |
| pthread_join (pthread_t thread, void **valuep) |
| { |
| return glwthread_thread_join (thread, valuep); |
| } |
| |
| void |
| pthread_exit (void *value) |
| { |
| glwthread_thread_exit (value); |
| } |
| |
| #elif HAVE_PTHREAD_H |
| /* Provide workarounds for POSIX threads. */ |
| |
| # if PTHREAD_CREATE_IS_INLINE |
| int |
| pthread_create (pthread_t *threadp, const pthread_attr_t *attr, |
| pthread_main_function_t mainfunc, void *arg) |
| # undef pthread_create |
| { |
| return pthread_create (threadp, attr, mainfunc, arg); |
| } |
| |
| int |
| pthread_attr_init (pthread_attr_t *attr) |
| # undef pthread_attr_init |
| { |
| return pthread_attr_init (attr); |
| } |
| |
| # endif |
| |
| #else |
| /* Provide a dummy implementation for single-threaded applications. */ |
| |
| int |
| pthread_create (pthread_t *threadp, const pthread_attr_t *attr, |
| pthread_main_function_t mainfunc, void *arg) |
| { |
| /* The maximum number of threads is reached. Do not create a thread. */ |
| return EAGAIN; |
| } |
| |
| pthread_t |
| pthread_self (void) |
| { |
| return 42; |
| } |
| |
| int |
| pthread_equal (pthread_t thread1, pthread_t thread2) |
| { |
| return thread1 == thread2; |
| } |
| |
| int |
| pthread_detach (pthread_t thread) |
| { |
| /* There are no joinable threads. */ |
| return EINVAL; |
| } |
| |
| int |
| pthread_join (pthread_t thread, void **valuep) |
| { |
| /* There are no joinable threads. */ |
| return EINVAL; |
| } |
| |
| void |
| pthread_exit (void *value) |
| { |
| /* There is just one thread, so the process exits. */ |
| exit (0); |
| } |
| |
| #endif |