From 3e0814cd9862b89c7a39672672937477bd87ddfb Mon Sep 17 00:00:00 2001 From: Andreas Rottmann Date: Thu, 27 May 2010 18:23:15 +0200 Subject: Imported Upstream version 0.9.3 --- tests/glthread/thread.c | 218 ++++++++++++++++++++++++++++ tests/glthread/thread.h | 376 ++++++++++++++++++++++++++++++++++++++++++++++++ tests/glthread/yield.h | 121 ++++++++++++++++ 3 files changed, 715 insertions(+) create mode 100644 tests/glthread/thread.c create mode 100644 tests/glthread/thread.h create mode 100644 tests/glthread/yield.h (limited to 'tests/glthread') diff --git a/tests/glthread/thread.c b/tests/glthread/thread.c new file mode 100644 index 00000000..52379942 --- /dev/null +++ b/tests/glthread/thread.c @@ -0,0 +1,218 @@ +/* Creating and controlling threads. + Copyright (C) 2005-2010 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 3, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Bruno Haible , 2005. + Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-solaris.h, + gthr-win32.h. */ + +#include + +/* Specification. */ +#include "glthread/thread.h" + +#include +#include "glthread/lock.h" + +/* ========================================================================= */ + +#if USE_WIN32_THREADS + +#include + +/* -------------------------- gl_thread_t datatype -------------------------- */ + +/* The Thread-Local Storage (TLS) key that allows to access each thread's + 'struct gl_thread_struct *' pointer. */ +static DWORD self_key = (DWORD)-1; + +/* Initializes self_key. This function must only be called once. */ +static void +do_init_self_key (void) +{ + self_key = TlsAlloc (); + /* If this fails, we're hosed. */ + if (self_key == (DWORD)-1) + abort (); +} + +/* Initializes self_key. */ +static void +init_self_key (void) +{ + gl_once_define(static, once) + gl_once (once, do_init_self_key); +} + +/* This structure contains information about a thread. + It is stored in TLS under key self_key. */ +struct gl_thread_struct +{ + /* Fields for managing the handle. */ + HANDLE volatile handle; + CRITICAL_SECTION handle_lock; + /* Fields for managing the exit value. */ + void * volatile result; + /* Fields for managing the thread start. */ + void * (*func) (void *); + void *arg; +}; + +/* Return a real HANDLE object for the current thread. */ +static inline HANDLE +get_current_thread_handle (void) +{ + HANDLE this_handle; + + /* GetCurrentThread() returns a pseudo-handle, i.e. only a symbolic + identifier, not a real handle. */ + if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), + GetCurrentProcess (), &this_handle, + 0, FALSE, DUPLICATE_SAME_ACCESS)) + abort (); + return this_handle; +} + +gl_thread_t +gl_thread_self_func (void) +{ + gl_thread_t thread; + + if (self_key == (DWORD)-1) + init_self_key (); + thread = TlsGetValue (self_key); + if (thread == NULL) + { + /* This happens only in threads that have not been created through + glthread_create(), such as the main thread. */ + for (;;) + { + thread = + (struct gl_thread_struct *) + malloc (sizeof (struct gl_thread_struct)); + if (thread != NULL) + break; + /* Memory allocation failed. There is not much we can do. Have to + busy-loop, waiting for the availability of memory. */ + Sleep (1); + } + + thread->handle = get_current_thread_handle (); + InitializeCriticalSection (&thread->handle_lock); + thread->result = NULL; /* just to be deterministic */ + TlsSetValue (self_key, thread); + } + return thread; +} + +/* The main function of a freshly creating thread. It's a wrapper around + the FUNC and ARG arguments passed to glthread_create_func. */ +static unsigned int WINAPI +wrapper_func (void *varg) +{ + struct gl_thread_struct *thread = (struct gl_thread_struct *)varg; + + EnterCriticalSection (&thread->handle_lock); + /* Create a new handle for the thread only if the parent thread did not yet + fill in the handle. */ + if (thread->handle == NULL) + thread->handle = get_current_thread_handle (); + LeaveCriticalSection (&thread->handle_lock); + + if (self_key == (DWORD)-1) + init_self_key (); + TlsSetValue (self_key, thread); + + /* Run the thread. Store the exit value if the thread was not terminated + otherwise. */ + thread->result = thread->func (thread->arg); + return 0; +} + +int +glthread_create_func (gl_thread_t *threadp, void * (*func) (void *), void *arg) +{ + struct gl_thread_struct *thread = + (struct gl_thread_struct *) malloc (sizeof (struct gl_thread_struct)); + if (thread == NULL) + return ENOMEM; + thread->handle = NULL; + InitializeCriticalSection (&thread->handle_lock); + thread->result = NULL; /* just to be deterministic */ + thread->func = func; + thread->arg = arg; + + { + unsigned int thread_id; + HANDLE thread_handle; + + thread_handle = (HANDLE) + _beginthreadex (NULL, 100000, wrapper_func, thread, 0, &thread_id); + /* calls CreateThread with the same arguments */ + if (thread_handle == NULL) + { + DeleteCriticalSection (&thread->handle_lock); + free (thread); + return EAGAIN; + } + + EnterCriticalSection (&thread->handle_lock); + if (thread->handle == NULL) + thread->handle = thread_handle; + else + /* thread->handle was already set by the thread itself. */ + CloseHandle (thread_handle); + LeaveCriticalSection (&thread->handle_lock); + + *threadp = thread; + return 0; + } +} + +int +glthread_join_func (gl_thread_t thread, void **retvalp) +{ + if (thread == NULL) + return EINVAL; + + if (thread == gl_thread_self ()) + return EDEADLK; + + if (WaitForSingleObject (thread->handle, INFINITE) == WAIT_FAILED) + return EINVAL; + + if (retvalp != NULL) + *retvalp = thread->result; + + DeleteCriticalSection (&thread->handle_lock); + CloseHandle (thread->handle); + free (thread); + + return 0; +} + +int +gl_thread_exit_func (void *retval) +{ + gl_thread_t thread = gl_thread_self (); + thread->result = retval; + _endthreadex (0); /* calls ExitThread (0) */ + abort (); +} + +#endif + +/* ========================================================================= */ diff --git a/tests/glthread/thread.h b/tests/glthread/thread.h new file mode 100644 index 00000000..d35be0db --- /dev/null +++ b/tests/glthread/thread.h @@ -0,0 +1,376 @@ +/* Creating and controlling threads. + Copyright (C) 2005-2010 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 3, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Bruno Haible , 2005. + Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-solaris.h, + gthr-win32.h. */ + +/* This file contains primitives for creating and controlling threads. + + Thread data type: gl_thread_t. + + Creating a thread: + thread = gl_thread_create (func, arg); + Or with control of error handling: + err = glthread_create (&thread, func, arg); + extern int glthread_create (gl_thread_t *result, + void *(*func) (void *), void *arg); + + Querying and changing the signal mask of a thread (not supported on all + platforms): + gl_thread_sigmask (how, newmask, oldmask); + Or with control of error handling: + err = glthread_sigmask (how, newmask, oldmask); + extern int glthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask); + + Waiting for termination of another thread: + gl_thread_join (thread, &return_value); + Or with control of error handling: + err = glthread_join (thread, &return_value); + extern int glthread_join (gl_thread_t thread, void **return_value_ptr); + + Getting a reference to the current thread: + current = gl_thread_self (); + extern gl_thread_t gl_thread_self (void); + + Terminating the current thread: + gl_thread_exit (return_value); + extern void gl_thread_exit (void *return_value) __attribute__ ((noreturn)); + + Requesting custom code to be executed at fork() time(not supported on all + platforms): + gl_thread_atfork (prepare_func, parent_func, child_func); + Or with control of error handling: + err = glthread_atfork (prepare_func, parent_func, child_func); + extern int glthread_atfork (void (*prepare_func) (void), + void (*parent_func) (void), + void (*child_func) (void)); + Note that even on platforms where this is supported, use of fork() and + threads together is problematic, see + + */ + + +#ifndef _GLTHREAD_THREAD_H +#define _GLTHREAD_THREAD_H + +#include +#include + +/* ========================================================================= */ + +#if USE_POSIX_THREADS + +/* Use the POSIX threads library. */ + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# if PTHREAD_IN_USE_DETECTION_HARD + +/* The pthread_in_use() detection needs to be done at runtime. */ +# define pthread_in_use() \ + glthread_in_use () +extern int glthread_in_use (void); + +# endif + +# if USE_POSIX_THREADS_WEAK + +/* Use weak references to the POSIX threads library. */ + +/* Weak references avoid dragging in external libraries if the other parts + of the program don't use them. Here we use them, because we don't want + every program that uses libintl to depend on libpthread. This assumes + that libpthread would not be loaded after libintl; i.e. if libintl is + loaded first, by an executable that does not depend on libpthread, and + then a module is dynamically loaded that depends on libpthread, libintl + will not be multithread-safe. */ + +/* The way to test at runtime whether libpthread is present is to test + whether a function pointer's value, such as &pthread_mutex_init, is + non-NULL. However, some versions of GCC have a bug through which, in + PIC mode, &foo != NULL always evaluates to true if there is a direct + call to foo(...) in the same function. To avoid this, we test the + address of a function in libpthread that we don't use. */ + +# pragma weak pthread_create +# pragma weak pthread_sigmask +# pragma weak pthread_join +# ifndef pthread_self +# pragma weak pthread_self +# endif +# pragma weak pthread_exit +# if HAVE_PTHREAD_ATFORK +# pragma weak pthread_atfork +# endif + +# if !PTHREAD_IN_USE_DETECTION_HARD +# pragma weak pthread_cancel +# define pthread_in_use() (pthread_cancel != NULL) +# endif + +# else + +# if !PTHREAD_IN_USE_DETECTION_HARD +# define pthread_in_use() 1 +# endif + +# endif + +/* -------------------------- gl_thread_t datatype -------------------------- */ + +/* This choice of gl_thread_t assumes that + pthread_equal (a, b) is equivalent to ((a) == (b)). + This is the case on all platforms in use in 2008. */ +typedef pthread_t gl_thread_t; +# define glthread_create(THREADP, FUNC, ARG) \ + (pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS) +# define glthread_sigmask(HOW, SET, OSET) \ + (pthread_in_use () ? pthread_sigmask (HOW, SET, OSET) : 0) +# define glthread_join(THREAD, RETVALP) \ + (pthread_in_use () ? pthread_join (THREAD, RETVALP) : 0) +# define gl_thread_self() \ + (pthread_in_use () ? (void *) pthread_self () : NULL) +# define gl_thread_exit(RETVAL) \ + (pthread_in_use () ? pthread_exit (RETVAL) : 0) + +# if HAVE_PTHREAD_ATFORK +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) \ + (pthread_in_use () ? pthread_atfork (PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) : 0) +# else +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0 +# endif + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_PTH_THREADS + +/* Use the GNU Pth threads library. */ + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# if USE_PTH_THREADS_WEAK + +/* Use weak references to the GNU Pth threads library. */ + +# pragma weak pth_spawn +# pragma weak pth_sigmask +# pragma weak pth_join +# pragma weak pth_self +# pragma weak pth_exit + +# pragma weak pth_cancel +# define pth_in_use() (pth_cancel != NULL) + +# else + +# define pth_in_use() 1 + +# endif +/* -------------------------- gl_thread_t datatype -------------------------- */ + +typedef pth_t gl_thread_t; +# define glthread_create(THREADP, FUNC, ARG) \ + (pth_in_use () ? ((*(THREADP) = pth_spawn (NULL, FUNC, ARG)) ? 0 : errno) : 0) +# define glthread_sigmask(HOW, SET, OSET) \ + (pth_in_use () && !pth_sigmask (HOW, SET, OSET) ? errno : 0) +# define glthread_join(THREAD, RETVALP) \ + (pth_in_use () && !pth_join (THREAD, RETVALP) ? errno : 0) +# define gl_thread_self() \ + (pth_in_use () ? (void *) pth_self () : 0) +# define gl_thread_exit(RETVAL) \ + (pth_in_use () ? pth_exit (RETVAL) : 0) +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0 + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_SOLARIS_THREADS + +/* Use the old Solaris threads library. */ + +# include +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# if USE_SOLARIS_THREADS_WEAK + +/* Use weak references to the old Solaris threads library. */ + +# pragma weak thr_create +# pragma weak thr_join +# pragma weak thr_self +# pragma weak thr_exit + +# pragma weak thr_suspend +# define thread_in_use() (thr_suspend != NULL) + +# else + +# define thread_in_use() 1 + +# endif + +/* -------------------------- gl_thread_t datatype -------------------------- */ + +typedef thread_t gl_thread_t; +# define glthread_create(THREADP, FUNC, ARG) \ + (thread_in_use () ? thr_create (NULL, 0, FUNC, ARG, 0, THREADP) : 0) +# define glthread_sigmask(HOW, SET, OSET) \ + (thread_in_use () ? sigprocmask (HOW, SET, OSET) : 0) +# define glthread_join(THREAD, RETVALP) \ + (thread_in_use () ? thr_join (THREAD, NULL, RETVALP) : 0) +# define gl_thread_self() \ + (thread_in_use () ? (void *) thr_self () : 0) +# define gl_thread_exit(RETVAL) \ + (thread_in_use () ? thr_exit (RETVAL) : 0) +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0 + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_WIN32_THREADS + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +/* -------------------------- gl_thread_t datatype -------------------------- */ + +/* The gl_thread_t is a pointer to a structure in memory. + Why not the thread handle? If it were the thread handle, it would be hard + to implement gl_thread_self() (since GetCurrentThread () returns a pseudo- + handle, DuplicateHandle (GetCurrentThread ()) returns a handle that must be + closed afterwards, and there is no function for quickly retrieving a thread + handle from its id). + Why not the thread id? I tried it. It did not work: Sometimes ids appeared + that did not belong to running threads, and glthread_join failed with ESRCH. + */ +typedef struct gl_thread_struct *gl_thread_t; +# define glthread_create(THREADP, FUNC, ARG) \ + glthread_create_func (THREADP, FUNC, ARG) +# define glthread_sigmask(HOW, SET, OSET) \ + /* unsupported */ 0 +# define glthread_join(THREAD, RETVALP) \ + glthread_join_func (THREAD, RETVALP) +# define gl_thread_self() \ + gl_thread_self_func () +# define gl_thread_exit(RETVAL) \ + gl_thread_exit_func (RETVAL) +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0 +extern int glthread_create_func (gl_thread_t *threadp, void * (*func) (void *), void *arg); +extern int glthread_join_func (gl_thread_t thread, void **retvalp); +extern gl_thread_t gl_thread_self_func (void); +extern int gl_thread_exit_func (void *retval); + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WIN32_THREADS) + +/* Provide dummy implementation if threads are not supported. */ + +typedef int gl_thread_t; +# define glthread_create(THREADP, FUNC, ARG) ENOSYS +# define glthread_sigmask(HOW, SET, OSET) 0 +# define glthread_join(THREAD, RETVALP) 0 +# define gl_thread_self() NULL +# define gl_thread_exit(RETVAL) 0 +# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0 + +#endif + +/* ========================================================================= */ + +/* Macros with built-in error handling. */ + +#ifdef __cplusplus +extern "C" { +#endif + +static inline gl_thread_t +gl_thread_create (void *(*func) (void *arg), void *arg) +{ + gl_thread_t thread; + int ret; + + ret = glthread_create (&thread, func, arg); + if (ret != 0) + abort (); + return thread; +} +#define gl_thread_sigmask(HOW, SET, OSET) \ + do \ + { \ + if (glthread_sigmask (HOW, SET, OSET)) \ + abort (); \ + } \ + while (0) +#define gl_thread_join(THREAD, RETVAL) \ + do \ + { \ + if (glthread_join (THREAD, RETVAL)) \ + abort (); \ + } \ + while (0) +#define gl_thread_atfork(PREPARE, PARENT, CHILD) \ + do \ + { \ + if (glthread_atfork (PREPARE, PARENT, CHILD)) \ + abort (); \ + } \ + while (0) + +#ifdef __cplusplus +} +#endif + +#endif /* _GLTHREAD_THREAD_H */ diff --git a/tests/glthread/yield.h b/tests/glthread/yield.h new file mode 100644 index 00000000..df61ac4a --- /dev/null +++ b/tests/glthread/yield.h @@ -0,0 +1,121 @@ +/* Yielding the processor to other threads and processes. + Copyright (C) 2005-2010 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 3, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* This file contains a primitive for yielding the processor to other threads. + extern void gl_thread_yield (void); + */ + +#ifndef _GLTHREAD_YIELD_H +#define _GLTHREAD_YIELD_H + +#include + +/* ========================================================================= */ + +#if USE_POSIX_THREADS + +/* Use the POSIX threads library. */ + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# define gl_thread_yield() \ + sched_yield () + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_PTH_THREADS + +/* Use the GNU Pth threads library. */ + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# define gl_thread_yield() \ + pth_yield (NULL) + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_SOLARIS_THREADS + +/* Use the old Solaris threads library. */ + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# define gl_thread_yield() \ + thr_yield () + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if USE_WIN32_THREADS + +# include + +# ifdef __cplusplus +extern "C" { +# endif + +# define gl_thread_yield() \ + Sleep (0) + +# ifdef __cplusplus +} +# endif + +#endif + +/* ========================================================================= */ + +#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WIN32_THREADS) + +/* Provide dummy implementation if threads are not supported. */ + +# define gl_thread_yield() 0 + +#endif + +/* ========================================================================= */ + +#endif /* _GLTHREAD_YIELD_H */ -- cgit v1.2.3