summaryrefslogtreecommitdiff
path: root/tests/glthread
diff options
context:
space:
mode:
Diffstat (limited to 'tests/glthread')
-rw-r--r--tests/glthread/thread.c218
-rw-r--r--tests/glthread/thread.h376
-rw-r--r--tests/glthread/yield.h121
3 files changed, 715 insertions, 0 deletions
diff --git a/tests/glthread/thread.c b/tests/glthread/thread.c
new file mode 100644
index 0000000..5237994
--- /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 <bruno@clisp.org>, 2005.
+ Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-solaris.h,
+ gthr-win32.h. */
+
+#include <config.h>
+
+/* Specification. */
+#include "glthread/thread.h"
+
+#include <stdlib.h>
+#include "glthread/lock.h"
+
+/* ========================================================================= */
+
+#if USE_WIN32_THREADS
+
+#include <process.h>
+
+/* -------------------------- 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 0000000..d35be0d
--- /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 <bruno@clisp.org>, 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
+ <http://lists.gnu.org/archive/html/bug-gnulib/2008-08/msg00062.html>
+ */
+
+
+#ifndef _GLTHREAD_THREAD_H
+#define _GLTHREAD_THREAD_H
+
+#include <errno.h>
+#include <stdlib.h>
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library. */
+
+# include <pthread.h>
+
+# 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 <pth.h>
+
+# 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 <thread.h>
+# include <synch.h>
+
+# 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 <windows.h>
+
+# 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 0000000..df61ac4
--- /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 <errno.h>
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library. */
+
+# include <sched.h>
+
+# 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 <pth.h>
+
+# 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 <thread.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+ thr_yield ()
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WIN32_THREADS
+
+# include <windows.h>
+
+# 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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 14:05:54 +0000