gnulib module 'tls'.

2 files changed, 382 insertions, 0 deletions

diff --git a/gettext-tools/lib/tls.c b/gettext-tools/lib/tls.c
new file mode 100644
index 0000000..d7097d2
--- /dev/null
+++ b/gettext-tools/lib/tls.c
@@ -0,0 +1,65 @@
+/* Thread-local storage in multithreaded situations.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+   This program 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, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library 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.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "tls.h"
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_PTH_THREADS
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_SOLARIS_THREADS
+
+/* Use the old Solaris threads library.  */
+
+/* ------------------------- gl_tls_key_t datatype ------------------------- */
+
+void
+glthread_tls_get (thread_key_t key)
+{
+  void *value;
+
+  if (thr_getspecific (key, &value) != 0)
+    abort ();
+  return value;
+}
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WIN32_THREADS
+
+#endif
+
+/* ========================================================================= */
diff --git a/gettext-tools/lib/tls.h b/gettext-tools/lib/tls.h
new file mode 100644
index 0000000..fadce76
--- /dev/null
+++ b/gettext-tools/lib/tls.h
@@ -0,0 +1,317 @@
+/* Thread-local storage in multithreaded situations.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+   This program 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, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library 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.  */
+
+/* This file contains thread-local storage primitives for use with a given
+   thread library.  It does not contain primitives for creating threads or
+   for other multithreading primitives.
+
+   Type:                      gl_tls_key_t
+   Initialization:            gl_tls_key_init (name, destructor);
+   Getting per-thread value:  gl_tls_get (name)
+   Setting per-thread value:  gl_tls_set (name, pointer);
+   De-initialization:         gl_tls_key_destroy (name);
+
+   A per-thread value is of type 'void *'.
+
+   A destructor is a function pointer of type 'void (*) (void *)', called
+   when a thread exits, and taking the last per-thread value as argument.  It
+   is unspecified whether the destructor function is called when the last
+   per-thread value is NULL.  On some platforms, the destructor function is
+   not called at all.
+*/
+
+
+#ifndef _TLS_H
+#define _TLS_H
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <pthread.h>
+# include <stdlib.h>
+
+# 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.  */
+
+#  pragma weak pthread_key_create
+#  pragma weak pthread_getspecific
+#  pragma weak pthread_setspecific
+#  pragma weak pthread_key_delete
+#  ifndef pthread_self
+#   pragma weak pthread_self
+#  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_tls_key_t datatype ------------------------- */
+
+typedef union
+        {
+          void *singlethread_value;
+          pthread_key_t key;
+        }
+        gl_tls_key_t;
+# define gl_tls_key_init(NAME, DESTRUCTOR) \
+    do                                                             \
+      {                                                            \
+        if (pthread_in_use ())                                     \
+          {                                                        \
+            if (pthread_key_create (&(NAME).key, DESTRUCTOR) != 0) \
+              abort ();                                            \
+          }                                                        \
+        else                                                       \
+          (NAME).singlethread_value = NULL;                        \
+      }                                                            \
+    while (0)
+# define gl_tls_get(NAME) \
+    (pthread_in_use ()                  \
+     ? pthread_getspecific ((NAME).key) \
+     : (NAME).singlethread_value)
+# define gl_tls_set(NAME, POINTER) \
+    do                                                            \
+      {                                                           \
+        if (pthread_in_use ())                                    \
+          {                                                       \
+            if (pthread_setspecific ((NAME).key, (POINTER)) != 0) \
+              abort ();                                           \
+          }                                                       \
+        else                                                      \
+          (NAME).singlethread_value = (POINTER);                  \
+      }                                                           \
+    while (0)
+# define gl_tls_key_destroy(NAME) \
+    if (pthread_in_use () && pthread_key_delete ((NAME).key) != 0) \
+      abort ()
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_PTH_THREADS
+
+/* Use the GNU Pth threads library.  */
+
+# include <pth.h>
+# include <stdlib.h>
+
+# if USE_PTH_THREADS_WEAK
+
+/* Use weak references to the GNU Pth threads library.  */
+
+#  pragma weak pth_key_create
+#  pragma weak pth_key_getdata
+#  pragma weak pth_key_setdata
+#  pragma weak pth_key_delete
+
+#  pragma weak pth_cancel
+#  define pth_in_use() (pth_cancel != NULL)
+
+# else
+
+#  define pth_in_use() 1
+
+# endif
+
+/* ------------------------- gl_tls_key_t datatype ------------------------- */
+
+typedef union
+        {
+          void *singlethread_value;
+          pth_key_t key;
+        }
+        gl_tls_key_t;
+# define gl_tls_key_init(NAME, DESTRUCTOR) \
+    do                                                     \
+      {                                                    \
+        if (pth_in_use ())                                 \
+          {                                                \
+            if (!pth_key_create (&(NAME).key, DESTRUCTOR)) \
+              abort ();                                    \
+          }                                                \
+        else                                               \
+          (NAME).singlethread_value = NULL;                \
+      }                                                    \
+    while (0)
+# define gl_tls_get(NAME) \
+    (pth_in_use ()                  \
+     ? pth_key_getdata ((NAME).key) \
+     : (NAME).singlethread_value)
+# define gl_tls_set(NAME, POINTER) \
+    do                                                    \
+      {                                                   \
+        if (pth_in_use ())                                \
+          {                                               \
+            if (!pth_key_setdata ((NAME).key, (POINTER))) \
+              abort ();                                   \
+          }                                               \
+        else                                              \
+          (NAME).singlethread_value = (POINTER);          \
+      }                                                   \
+    while (0)
+# define gl_tls_key_destroy(NAME) \
+    if (pth_in_use () && !pth_key_delete ((NAME).key)) \
+      abort ()
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_SOLARIS_THREADS
+
+/* Use the old Solaris threads library.  */
+
+# include <thread.h>
+# include <stdlib.h>
+
+# if USE_SOLARIS_THREADS_WEAK
+
+/* Use weak references to the old Solaris threads library.  */
+
+#  pragma weak thr_keycreate
+#  pragma weak thr_getspecific
+#  pragma weak thr_setspecific
+
+#  pragma weak thr_suspend
+#  define thread_in_use() (thr_suspend != NULL)
+
+# else
+
+#  define thread_in_use() 1
+
+# endif
+
+/* ------------------------- gl_tls_key_t datatype ------------------------- */
+
+typedef union
+        {
+          void *singlethread_value;
+          thread_key_t key;
+        }
+        gl_tls_key_t;
+# define gl_tls_key_init(NAME, DESTRUCTOR) \
+    do                                                        \
+      {                                                       \
+        if (thread_in_use ())                                 \
+          {                                                   \
+            if (thr_keycreate (&(NAME).key, DESTRUCTOR) != 0) \
+              abort ();                                       \
+          }                                                   \
+        else                                                  \
+          (NAME).singlethread_value = NULL;                   \
+      }                                                       \
+    while (0)
+# define gl_tls_get(NAME) \
+    (thread_in_use ()                \
+     ? glthread_tls_get ((NAME).key) \
+     : (NAME).singlethread_value)
+extern void *glthread_tls_get (thread_key_t key);
+# define gl_tls_set(NAME, POINTER) \
+    do                                                        \
+      {                                                       \
+        if (thread_in_use ())                                 \
+          {                                                   \
+            if (thr_setspecific ((NAME).key, (POINTER)) != 0) \
+              abort ();                                       \
+          }                                                   \
+        else                                                  \
+          (NAME).singlethread_value = (POINTER);              \
+      }                                                       \
+    while (0)
+# define gl_tls_key_destroy(NAME) \
+    /* Unsupported.  */ \
+    (void)0
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WIN32_THREADS
+
+# include <windows.h>
+
+/* ------------------------- gl_tls_key_t datatype ------------------------- */
+
+typedef DWORD gl_tls_key_t;
+# define gl_tls_key_init(NAME, DESTRUCTOR) \
+    /* The destructor is unsupported.  */    \
+    if (((NAME) = TlsAlloc ()) == (DWORD)-1) \
+      abort ()
+# define gl_tls_get(NAME) \
+    TlsGetValue (NAME)
+# define gl_tls_set(NAME, POINTER) \
+    if (!TlsSetValue (NAME, POINTER)) \
+      abort ()
+# define gl_tls_key_destroy(NAME) \
+    if (!TlsFree (NAME)) \
+      abort ()
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WIN32_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+/* ------------------------- gl_tls_key_t datatype ------------------------- */
+
+typedef struct
+        {
+          void *singlethread_value;
+        }
+        gl_tls_key_t;
+# define gl_tls_key_init(NAME, DESTRUCTOR) \
+    (NAME).singlethread_value = NULL
+# define gl_tls_get(NAME) \
+    (NAME).singlethread_value
+# define gl_tls_set(NAME, POINTER) \
+    (NAME).singlethread_value = (POINTER)
+# define gl_tls_key_destroy(NAME) \
+    (void)0
+
+#endif
+
+/* ========================================================================= */
+
+#endif /* _TLS_H */