From ce4f3efd78c110c015c54eab05f201d1caac5f8d Mon Sep 17 00:00:00 2001 From: Guenter Bartsch Date: Sun, 20 Apr 2003 16:42:06 +0000 Subject: importing win32 contrib sources and msvc build environment CVS patchset: 4641 CVS date: 2003/04/20 16:42:06 --- win32/contrib/pthreads/attr.c | 533 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 533 insertions(+) create mode 100644 win32/contrib/pthreads/attr.c (limited to 'win32/contrib/pthreads/attr.c') diff --git a/win32/contrib/pthreads/attr.c b/win32/contrib/pthreads/attr.c new file mode 100644 index 000000000..67f7be9c8 --- /dev/null +++ b/win32/contrib/pthreads/attr.c @@ -0,0 +1,533 @@ +/* + * attr.c + * + * Description: + * This translation unit implements operations on thread attribute objects. + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright (C) 1998 + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + * MA 02111-1307, USA + */ + +/* ignore warning "unreferenced formal parameter" */ +#ifdef _MSC_VER +#pragma warning( disable : 4100 ) +#endif + +#include "pthread.h" +#include "implement.h" + +static INLINE int +is_attr(const pthread_attr_t *attr) +{ + /* Return 0 if the attr object is valid, non-zero otherwise. */ + + return (attr == NULL || + *attr == NULL || + (*attr)->valid != PTW32_ATTR_VALID); +} + + +int +pthread_attr_setstacksize(pthread_attr_t *attr, + size_t stacksize) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function specifies the size of the stack on + * which threads created with 'attr' will run. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * stacksize + * stack size, in bytes. + * + * + * DESCRIPTION + * This function specifies the size of the stack on + * which threads created with 'attr' will run. + * + * NOTES: + * 1) Function supported only if this macro is + * defined: + * + * _POSIX_THREAD_ATTR_STACKSIZE + * + * 2) Find the default first (using + * pthread_attr_getstacksize), then increase + * by multiplying. + * + * 3) Only use if thread needs more than the + * default. + * + * RESULTS + * 0 successfully set stack size, + * EINVAL 'attr' is invalid or stacksize too + * small or too big. + * ENOSYS function not supported + * + * ------------------------------------------------------ + */ +{ +#ifdef _POSIX_THREAD_ATTR_STACKSIZE + + /* Verify that the stack size is within range. */ + if (stacksize < PTHREAD_STACK_MIN) + { + return EINVAL; + } + + if (is_attr(attr) != 0) + { + return EINVAL; + } + + /* Everything is okay. */ + (*attr)->stacksize = stacksize; + return 0; + +#else + + return ENOSYS; + +#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ + +} + +int +pthread_attr_getstacksize(const pthread_attr_t *attr, + size_t *stacksize) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function determines the size of the stack on + * which threads created with 'attr' will run. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * stacksize + * pointer to size_t into which is returned the + * stack size, in bytes. + * + * + * DESCRIPTION + * This function determines the size of the stack on + * which threads created with 'attr' will run. + * + * NOTES: + * 1) Function supported only if this macro is + * defined: + * + * _POSIX_THREAD_ATTR_STACKSIZE + * + * 2) Use on newly created attributes object to + * find the default stack size. + * + * RESULTS + * 0 successfully retrieved stack size, + * EINVAL 'attr' is invalid + * ENOSYS function not supported + * + * ------------------------------------------------------ + */ +{ +#ifdef _POSIX_THREAD_ATTR_STACKSIZE + + if (is_attr(attr) != 0) + { + return EINVAL; + } + + /* Everything is okay. */ + *stacksize = (*attr)->stacksize; + return 0; + +#else + + return ENOSYS; + +#endif /* _POSIX_THREAD_ATTR_STACKSIZE */ + +} + + +int +pthread_attr_setstackaddr(pthread_attr_t *attr, + void *stackaddr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * Threads created with 'attr' will run on the stack + * starting at 'stackaddr'. + * Stack must be at least PTHREAD_STACK_MIN bytes. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * stacksize + * stack size, in bytes. + * + * + * DESCRIPTION + * Threads created with 'attr' will run on the stack + * starting at 'stackaddr'. + * Stack must be at least PTHREAD_STACK_MIN bytes. + * + * NOTES: + * 1) Function supported only if this macro is + * defined: + * + * _POSIX_THREAD_ATTR_STACKADDR + * + * 2) Create only one thread for each stack + * address.. + * + * 3) Ensure that stackaddr is aligned. + * + * RESULTS + * 0 successfully set stack address, + * EINVAL 'attr' is invalid + * ENOSYS function not supported + * + * ------------------------------------------------------ + */ +{ +#if defined( _POSIX_THREAD_ATTR_STACKADDR ) + + if (is_attr(attr) != 0) + { + return EINVAL; + } + + (*attr)->stackaddr = stackaddr; + return 0; + +#else + + return ENOSYS; + +#endif /* _POSIX_THREAD_ATTR_STACKADDR */ +} + +int +pthread_attr_getstackaddr(const pthread_attr_t *attr, + void **stackaddr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function determines the address of the stack + * on which threads created with 'attr' will run. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * stackaddr + * pointer into which is returned the stack address. + * + * + * DESCRIPTION + * This function determines the address of the stack + * on which threads created with 'attr' will run. + * + * NOTES: + * 1) Function supported only if this macro is + * defined: + * + * _POSIX_THREAD_ATTR_STACKADDR + * + * 2) Create only one thread for each stack + * address.. + * + * RESULTS + * 0 successfully retreived stack address, + * EINVAL 'attr' is invalid + * ENOSYS function not supported + * + * ------------------------------------------------------ + */ +{ +#if defined( _POSIX_THREAD_ATTR_STACKADDR ) + + if (is_attr(attr) != 0) + { + return EINVAL; + } + + *stackaddr = (*attr)->stackaddr; + return 0; + +#else + + return ENOSYS; + +#endif /* _POSIX_THREAD_ATTR_STACKADDR */ +} + + +int +pthread_attr_init(pthread_attr_t *attr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * Initializes a thread attributes object with default + * attributes. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * + * DESCRIPTION + * Initializes a thread attributes object with default + * attributes. + * + * NOTES: + * 1) Used to define thread attributes + * + * RESULTS + * 0 successfully initialized attr, + * ENOMEM insufficient memory for attr. + * + * ------------------------------------------------------ + */ +{ + pthread_attr_t attr_result; + + if (attr == NULL) + { + /* This is disallowed. */ + return EINVAL; + } + + attr_result = (pthread_attr_t) malloc (sizeof (*attr_result)); + + if (attr_result == NULL) + { + return ENOMEM; + } + +#ifdef _POSIX_THREAD_ATTR_STACKSIZE + /* + * Default to zero size. Unless changed explicitly this + * will allow Win32 to set the size to that of the + * main thread. + */ + attr_result->stacksize = 0; +#endif + +#ifdef _POSIX_THREAD_ATTR_STACKADDR + /* FIXME: Set this to something sensible when we support it. */ + attr_result->stackaddr = NULL; +#endif + + attr_result->detachstate = PTHREAD_CREATE_JOINABLE; + +#if HAVE_SIGSET_T + memset(&(attr_result->sigmask), 0, sizeof(sigset_t)); +#endif /* HAVE_SIGSET_T */ + + /* + * Win32 sets new threads to THREAD_PRIORITY_NORMAL and + * not to that of the parent thread. We choose to default to + * this arrangement. + */ + attr_result->param.sched_priority = THREAD_PRIORITY_NORMAL; + attr_result->inheritsched = PTHREAD_EXPLICIT_SCHED; + + attr_result->valid = PTW32_ATTR_VALID; + + *attr = attr_result; + + return 0; +} + +int +pthread_attr_destroy(pthread_attr_t *attr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * Destroys a thread attributes object. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * + * DESCRIPTION + * Destroys a thread attributes object. + * + * NOTES: + * 1) Does not affect threads created with 'attr'. + * + * RESULTS + * 0 successfully destroyed attr, + * EINVAL 'attr' is invalid. + * + * ------------------------------------------------------ + */ +{ + if (is_attr(attr) != 0) + { + return EINVAL; + } + + /* + * Set the attribute object to a specific invalid value. + */ + (*attr)->valid = 0; + free (*attr); + *attr = NULL; + + return 0; +} + +int +pthread_attr_getdetachstate(const pthread_attr_t *attr, + int *detachstate) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function determines whether threads created with + * 'attr' will run detached. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * detachstate + * pointer to an integer into which is returned one + * of: + * + * PTHREAD_CREATE_JOINABLE + * Thread ID is valid, must be joined + * + * PTHREAD_CREATE_DETACHED + * Thread ID is invalid, cannot be joined, + * canceled, or modified + * + * + * DESCRIPTION + * This function determines whether threads created with + * 'attr' will run detached. + * + * NOTES: + * 1) You cannot join or cancel detached threads. + * + * RESULTS + * 0 successfully retrieved detach state, + * EINVAL 'attr' is invalid + * + * ------------------------------------------------------ + */ +{ + if (is_attr(attr) != 0 || detachstate == NULL) + { + *detachstate = PTHREAD_CREATE_DETACHED; + return EINVAL; + } + + *detachstate = (*attr)->detachstate; + return 0; +} + +int +pthread_attr_setdetachstate(pthread_attr_t *attr, + int detachstate) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function specifies whether threads created with + * 'attr' will run detached. + * + * PARAMETERS + * attr + * pointer to an instance of pthread_attr_t + * + * detachstate + * an integer containing one of: + * + * PTHREAD_CREATE_JOINABLE + * Thread ID is valid, must be joined + * + * PTHREAD_CREATE_DETACHED + * Thread ID is invalid, cannot be joined, + * canceled, or modified + * + * + * DESCRIPTION + * This function specifies whether threads created with + * 'attr' will run detached. + * + * NOTES: + * 1) You cannot join or cancel detached threads. + * + * RESULTS + * 0 successfully set detach state, + * EINVAL 'attr' or 'detachstate' is invalid + * + * ------------------------------------------------------ + */ +{ + if (is_attr(attr) != 0) + { + return EINVAL; + } + + if (detachstate != PTHREAD_CREATE_JOINABLE && + detachstate != PTHREAD_CREATE_DETACHED) + { + return EINVAL; + } + + (*attr)->detachstate = detachstate; + return 0; +} + + +int +pthread_attr_setscope(pthread_attr_t *attr, int contentionscope) +{ +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING + if (contentionscope != PTHREAD_SCOPE_SYSTEM) + { + return ENOTSUP; + } + + return 0; +#else + return ENOSYS; +#endif +} + + +int +pthread_attr_getscope(const pthread_attr_t *attr, int *contentionscope) +{ +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING + *contentionscope = PTHREAD_SCOPE_SYSTEM; + return 0; +#else + return ENOSYS; +#endif +} + -- cgit v1.2.3