rewrite to use the helpers in the thread/ directory and to define weak alias macros

author: d <> 2000-01-06 07:47:09 +0000
committer: d <> 2000-01-06 07:47:09 +0000
commit: 14aa38894d778e7f99f53bdcc95137de85b522d9 (patch)
tree: c2863bfab07c39154d85de51090b443e00948eb2 /src
parent: d96347fb8fe6b519f174beb4263729992c24229c (diff)
download: openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.tar.gz
openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.tar.bz2
openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.zip
1 files changed, 91 insertions, 135 deletions
diff --git a/src/lib/libc/include/thread_private.h b/src/lib/libc/include/thread_private.h
index 0027468269..b2677fad0e 100644
--- a/src/lib/libc/include/thread_private.h
+++ b/src/lib/libc/include/thread_private.h
@@ -1,179 +1,135 @@
-/*
+/* $OpenBSD: thread_private.h,v 1.3 2000/01/06 07:47:09 d Exp $ */
- *
- * Support for thread-safety in libc and libc_r common code using macros 
- * to declare thread-safe data structures.
- *
- * $OpenBSD: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
- */
 #ifndef _THREAD_PRIVATE_H_
 #define _THREAD_PRIVATE_H_
-/*
+#include <pthread.h>
- * Parts of this file are
- * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
- * All rights reserved.
- *
- * $Id: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
- * $OpenBSD: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
- */
 /*
- * This global flag is non-zero when a process has created one
+ * This variable is initally 0 when there is exactly one thread.
- * or more threads. It is used to avoid calling locking functions
+ * It should never decrease.
- * when they are not required. In libc, this is always assumed
- * to be zero.
 */
+extern int __isthreaded;
-extern volatile int     __isthreaded;
-#ifdef _THREAD_SAFE
-#include <pthread.h>
-#include "pthread_private.h"
 /*
- * File lock contention is difficult to diagnose without knowing
+ * Weak symbols are used in libc so that the thread library can
- * where locks were set. Allow a debug library to be built which
+ * efficiently wrap libc functions.
- * records the source file and line number of each lock call.
+ * 
+ * Use WEAK_NAME(n) to get a libc-private name for n (_weak_n),
+ *     WEAK_ALIAS(n) to generate the weak symbol n pointing to _weak_n,
+ *     WEAK_PROTOTYPE(n) to generate a prototype for _weak_n (based on n).
+ *
+ * If the symbol _NO_WEAK_ALIASES is defined, then symbols will be
 */
-#ifdef  _FLOCK_DEBUG
-#define _FLOCKFILE(x)   _flockfile_debug(x, __FILE__, __LINE__)
+#ifdef _NO_WEAK_ALIASES
+#defined _THREAD_SAFE
+#define WEAK_NAME(name)                 __CONCAT(_weak,name)
+#else
+#define WEAK_NAME(name)                 name
+#endif
+#define WEAK_ALIAS(name)                /* unavailable */
+#define WEAK_PROTOTYPE(name)            /* unnecessary */
+#else /* !_NO_WEAK_AILASES */
+#define WEAK_NAME(name)                 __CONCAT(_weak_,name)
+#define WEAK_ALIAS(name)                __weak_alias(name, WEAK_NAME(name))
+#ifdef __GNUC__
+#define WEAK_PROTOTYPE(name)            __typeof__(name) WEAK_NAME(name)
 #else
-#define _FLOCKFILE(x)   flockfile(x)
+#define WEAK_PROTOTYPE(name)            /* typeof() only in gcc */
 #endif
+#endif /* !_NO_WEAK_ALIASES */
 /*
 * These macros help in making persistent storage thread-specific.
 * Libc makes extensive use of private static data structures
 * that hold state across function invocation, and these macros
- * are no-ops when _THREAD_SAFE is not defined. 
+ * are no-ops when running single-threaded.
- * In a thread-safe library, the static variables are used only for
+ *
- * initialising the per-thread instances of the state variables.
+ * Linking against the user-thread library causes these macros to
+ * allocate storage on a per-thread basis.
 */
+        
+#define __THREAD_MUTEX_NAME(name)       __CONCAT(_libc_storage_mutex_,name)
+#define __THREAD_KEY_NAME(name)         __CONCAT(_libc_storage_key_,name)
-/*
+struct _thread_private_key_struct {
- * Give names to the private variables used to hold per-thread
+        pthread_once_t          once;
- * data structures.
+        void                    (*cleanfn)__P((void *));
- */
+        pthread_key_t           key;
-#ifdef __STDC__
+};
-#define __THREAD_MUTEXP_NAME(name)      _thread_mutexp_inst__ ## name
-#define __THREAD_MUTEX_NAME(name)       _thread_mutex_inst__ ## name
-#define __THREAD_KEY_NAME(name)         _thread_key_inst__ ## name
-#else
-#define __THREAD_MUTEXP_NAME(name)      _thread_mutexp_inst__/**/name
-#define __THREAD_MUTEX_NAME(name)       _thread_mutex_inst__/**/name
-#define __THREAD_KEY_NAME(name)         _thread_key_inst__/**/name
-#endif
-/*
+void    _libc_private_storage_lock(pthread_mutex_t *);
- * Mutex declare, lock and unlock macros.
+void    _libc_private_storage_unlock(pthread_mutex_t *);
- */
+void *  _libc_private_storage(volatile struct _thread_private_key_struct *,
+        void *, size_t, void *);
+/* Declare a module mutex. */
 #define _THREAD_PRIVATE_MUTEX(name)                                     \
-        static struct pthread_mutex __THREAD_MUTEXP_NAME(name) =        \
-                PTHREAD_MUTEX_STATIC_INITIALIZER;                       \
        static pthread_mutex_t __THREAD_MUTEX_NAME(name) =              \
-                &__THREAD_MUTEXP_NAME(name);
+                PTHREAD_MUTEX_INITIALIZER                       
                
+/* Lock a module mutex against use by any other threads. */
 #define _THREAD_PRIVATE_MUTEX_LOCK(name)                                \
-        pthread_mutex_lock(&__THREAD_MUTEX_NAME(name))
+        _libc_private_storage_lock(&__THREAD_MUTEX_NAME(name))
                
+/* Unlock a module mutex. */
 #define _THREAD_PRIVATE_MUTEX_UNLOCK(name)                              \
-        pthread_mutex_unlock(&__THREAD_MUTEX_NAME(name))
+        _libc_private_storage_unlock(&__THREAD_MUTEX_NAME(name))
-/*
+/* Declare a thread-private storage key. */
- * A mutexed data structure used to hold the persistent state's key.
- */
-struct _thread_private_key_struct {
-        struct pthread_mutex    lockd;
-        pthread_mutex_t         lock;
-        int                     init;
-        pthread_key_t           key;
-};
-/*
- * Declaration of a per-thread state key.
- */
 #define _THREAD_PRIVATE_KEY(name)                                       \
        static volatile struct _thread_private_key_struct               \
        __THREAD_KEY_NAME(name) = {                                     \
-                PTHREAD_MUTEX_STATIC_INITIALIZER,                       \
+                PTHREAD_ONCE_INIT,                                      \
-                &__THREAD_KEY_NAME(name).lockd,                         \
                0                                                       \
-        };
+        }
 /*
- * Initialisation of storage space for a per-thread state variable.
+ * In threaded mode, return a pointer to thread-private memory of
- * A pointer to a per-thread *copy* of the _initv parameter is returned.
+ * the same size as, and (initially) with the same contents as 'storage'. If
- * It calls malloc the first time and the space is automatically free'd
+ * an error occurs, the 'error' parameter is returned.
- * when the thread dies. If you need something a bit more complicated
+ * In single-threaded mode, no storage is allocated. Instead, a pointer
- * than free() you will need to roll-your-own.
+ * to storage is always returned.
+ * The 'cleanfn' function of the key structure is called to free the storage.
+ * If 'cleanfn' is NULL, then free() is used. This hook can be useful for
+ * getting rid of memory leaks.
 */
-#define _THREAD_PRIVATE(keyname, _initv, _errv)                         \
+#define _THREAD_PRIVATE(keyname, storage, error)                        \
-        ({                                                              \
+        _libc_private_storage(&__THREAD_KEY_NAME(keyname),              \
-                struct _thread_private_key_struct * __k =               \
+                &(storage), sizeof (storage), error)
-                        &__THREAD_KEY_NAME(keyname);                    \
-                void* __p;                                              \
-                extern void free __P((void*));                          \
-                extern void* malloc __P((size_t));                      \
-                                                                        \
-                if (!__isthreaded) {                                    \
-                        /* non-threaded behaviour */                    \
-                        __p = &(_initv);                                \
-                        goto _ok;                                       \
-                }                                                       \
-                                                                        \
-                /* create key for first thread */                       \
-                pthread_mutex_lock(&__k->lock);                         \
-                if (__k->init == 0) {                                   \
-                        if (pthread_key_create(&__k->key, free)) {      \
-                                pthread_mutex_unlock(&__k->lock);       \
-                                goto _err;                              \
-                        }                                               \
-                        __k->init = 1;                                  \
-                }                                                       \
-                pthread_mutex_unlock(&__k->lock);                       \
-                                                                        \
-                if ((__p = pthread_getspecific(__k->key)) == NULL) {    \
-                        /* alloc space on 1st call in this thread */    \
-                        if ((__p = malloc(sizeof(_initv))) == NULL)     \
-                                goto _err;                              \
-                                if (pthread_setspecific(__k->key, __p) != 0) { \
-                                        free(__p);                      \
-                                        goto _err;                      \
-                                }                                       \
-                        /* initialise with _initv */                    \
-                memcpy(__p, &_initv, sizeof(_initv));                   \
-                }                                                       \
-                goto _ok;                                               \
-        _err:                                                           \
-                __p = (_errv);                                          \
-        _ok:                                                            \
-                __p;                                                    \
-        })
 /*
 * Macros for locking and unlocking FILEs. These test if the
 * process is threaded to avoid locking when not required.
 */
-#define FLOCKFILE(fp)           if (__isthreaded) _FLOCKFILE(fp)
+#ifdef  _FLOCK_DEBUG
-#define FUNLOCKFILE(fp)         if (__isthreaded) funlockfile(fp)
+#define FLOCKFILE(fp)           _flockfile_debug(fp, __FILE__, __LINE__)
+#else
-#else /* !_THREAD_SAFE */
+#define FLOCKFILE(fp)           flockfile(fp)
+#endif
+#define FUNLOCKFILE(fp)         funlockfile(fp)
 /*
- * Do-nothing macros for single-threaded case.
+ * File descriptor locking definitions.
 */
-#define _FD_LOCK(f,o,p)                         (0)
+#define FD_READ             0x1
-#define _FD_UNLOCK(f,o)                         /* nothing */
+#define FD_WRITE            0x2
-#define _THREAD_PRIVATE_KEY(_key)               /* nothing */
+#define FD_RDWR             (FD_READ | FD_WRITE)
-#define _THREAD_PRIVATE(keyname, _initv, _errv) (&(_initv))
-#define _THREAD_PRIVATE_MUTEX(_name)            /* nothing */
+#ifdef  _LOCK_DEBUG
-#define _THREAD_PRIVATE_MUTEX_LOCK(_name)       /* nothing */
+#define _FD_LOCK(_fd,_type,_ts)         _thread_fd_lock_debug(_fd, _type, \
-#define _THREAD_PRIVATE_MUTEX_UNLOCK(_name)     /* nothing */
+                                                _ts, __FILE__, __LINE__)
-#define FLOCKFILE(fp)                           /* nothing */
+#define _FD_UNLOCK(_fd,_type)           _thread_fd_unlock_debug(_fd, _type, \
-#define FUNLOCKFILE(fp)                         /* nothing */
+                                                __FILE__, __LINE__)
+#else
-#endif /* !_THREAD_SAFE */
+#define _FD_LOCK(_fd,_type,_ts)         _thread_fd_lock(_fd, _type, _ts)
+#define _FD_UNLOCK(_fd,_type)           _thread_fd_unlock(_fd, _type)
+#endif
+int     _thread_fd_lock(int, int, struct timespec *);
+int     _thread_fd_lock_debug(int, int, struct timespec *, const char *, int);
+void    _thread_fd_unlock(int, int);
+void    _thread_fd_unlock_debug(int, int, const char *, int);
 #endif _THREAD_PRIVATE_H_
author	d <>	2000-01-06 07:47:09 +0000
committer	d <>	2000-01-06 07:47:09 +0000
commit	14aa38894d778e7f99f53bdcc95137de85b522d9 (patch)
tree	c2863bfab07c39154d85de51090b443e00948eb2 /src
parent	d96347fb8fe6b519f174beb4263729992c24229c (diff)
download	openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.tar.gz openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.tar.bz2 openbsd-14aa38894d778e7f99f53bdcc95137de85b522d9.zip

diff --git a/src/lib/libc/include/thread_private.h b/src/lib/libc/include/thread_private.h index 0027468269..b2677fad0e 100644 --- a/src/lib/libc/include/thread_private.h +++ b/src/lib/libc/include/thread_private.h
@@ -1,179 +1,135 @@
1	/*	1	/* $OpenBSD: thread_private.h,v 1.3 2000/01/06 07:47:09 d Exp $ */
2	*
3	* Support for thread-safety in libc and libc_r common code using macros
4	* to declare thread-safe data structures.
5	*
6	* $OpenBSD: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
7	*/
8		2
9	#ifndef _THREAD_PRIVATE_H_	3	#ifndef _THREAD_PRIVATE_H_
10	#define _THREAD_PRIVATE_H_	4	#define _THREAD_PRIVATE_H_
11		5
12	/*	6	#include <pthread.h>
13	* Parts of this file are
14	* Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
15	* All rights reserved.
16	*
17	* $Id: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
18	* $OpenBSD: thread_private.h,v 1.2 1999/01/06 05:19:32 d Exp $
19	*/
20		7
21	/*	8	/*
22	* This global flag is non-zero when a process has created one	9	* This variable is initally 0 when there is exactly one thread.
23	* or more threads. It is used to avoid calling locking functions	10	* It should never decrease.
24	* when they are not required. In libc, this is always assumed
25	* to be zero.
26	*/	11	*/
27		12	extern int __isthreaded;
28	extern volatile int __isthreaded;
29
30	#ifdef _THREAD_SAFE
31
32	#include <pthread.h>
33	#include "pthread_private.h"
34		13
35	/*	14	/*
36	* File lock contention is difficult to diagnose without knowing	15	* Weak symbols are used in libc so that the thread library can
37	* where locks were set. Allow a debug library to be built which	16	* efficiently wrap libc functions.
38	* records the source file and line number of each lock call.	17	*
		18	* Use WEAK_NAME(n) to get a libc-private name for n (_weak_n),
		19	* WEAK_ALIAS(n) to generate the weak symbol n pointing to _weak_n,
		20	* WEAK_PROTOTYPE(n) to generate a prototype for _weak_n (based on n).
		21	*
		22	* If the symbol _NO_WEAK_ALIASES is defined, then symbols will be
39	*/	23	*/
40	#ifdef _FLOCK_DEBUG	24
41	#define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)	25	#ifdef _NO_WEAK_ALIASES
		26	#defined _THREAD_SAFE
		27	#define WEAK_NAME(name) __CONCAT(_weak,name)
		28	#else
		29	#define WEAK_NAME(name) name
		30	#endif
		31	#define WEAK_ALIAS(name) /* unavailable */
		32	#define WEAK_PROTOTYPE(name) /* unnecessary */
		33	#else /* !_NO_WEAK_AILASES */
		34	#define WEAK_NAME(name) __CONCAT(_weak_,name)
		35	#define WEAK_ALIAS(name) __weak_alias(name, WEAK_NAME(name))
		36	#ifdef __GNUC__
		37	#define WEAK_PROTOTYPE(name) __typeof__(name) WEAK_NAME(name)
42	#else	38	#else
43	#define _FLOCKFILE(x) flockfile(x)	39	#define WEAK_PROTOTYPE(name) /* typeof() only in gcc */
44	#endif	40	#endif
		41	#endif /* !_NO_WEAK_ALIASES */
45		42
46	/*	43	/*
47	* These macros help in making persistent storage thread-specific.	44	* These macros help in making persistent storage thread-specific.
48	* Libc makes extensive use of private static data structures	45	* Libc makes extensive use of private static data structures
49	* that hold state across function invocation, and these macros	46	* that hold state across function invocation, and these macros
50	* are no-ops when _THREAD_SAFE is not defined.	47	* are no-ops when running single-threaded.
51	* In a thread-safe library, the static variables are used only for	48	*
52	* initialising the per-thread instances of the state variables.	49	* Linking against the user-thread library causes these macros to
		50	* allocate storage on a per-thread basis.
53	*/	51	*/
		52
		53	#define __THREAD_MUTEX_NAME(name) __CONCAT(_libc_storage_mutex_,name)
		54	#define __THREAD_KEY_NAME(name) __CONCAT(_libc_storage_key_,name)
54		55
55	/*	56	struct _thread_private_key_struct {
56	* Give names to the private variables used to hold per-thread	57	pthread_once_t once;
57	* data structures.	58	void (cleanfn)__P((void ));
58	*/	59	pthread_key_t key;
59	#ifdef __STDC__	60	};
60	#define __THREAD_MUTEXP_NAME(name) _thread_mutexp_inst__ ## name
61	#define __THREAD_MUTEX_NAME(name) _thread_mutex_inst__ ## name
62	#define __THREAD_KEY_NAME(name) _thread_key_inst__ ## name
63	#else
64	#define __THREAD_MUTEXP_NAME(name) _thread_mutexp_inst__/**/name
65	#define __THREAD_MUTEX_NAME(name) _thread_mutex_inst__/**/name
66	#define __THREAD_KEY_NAME(name) _thread_key_inst__/**/name
67	#endif
68		61
69	/*	62	void _libc_private_storage_lock(pthread_mutex_t *);
70	* Mutex declare, lock and unlock macros.	63	void _libc_private_storage_unlock(pthread_mutex_t *);
71	*/	64	void * _libc_private_storage(volatile struct _thread_private_key_struct *,
		65	void , size_t, void );
		66
		67	/* Declare a module mutex. */
72	#define _THREAD_PRIVATE_MUTEX(name) \	68	#define _THREAD_PRIVATE_MUTEX(name) \
73	static struct pthread_mutex __THREAD_MUTEXP_NAME(name) = \
74	PTHREAD_MUTEX_STATIC_INITIALIZER; \
75	static pthread_mutex_t __THREAD_MUTEX_NAME(name) = \	69	static pthread_mutex_t __THREAD_MUTEX_NAME(name) = \
76	&__THREAD_MUTEXP_NAME(name);	70	PTHREAD_MUTEX_INITIALIZER
77		71
		72	/* Lock a module mutex against use by any other threads. */
78	#define _THREAD_PRIVATE_MUTEX_LOCK(name) \	73	#define _THREAD_PRIVATE_MUTEX_LOCK(name) \
79	pthread_mutex_lock(&__THREAD_MUTEX_NAME(name))	74	_libc_private_storage_lock(&__THREAD_MUTEX_NAME(name))
80		75
		76	/* Unlock a module mutex. */
81	#define _THREAD_PRIVATE_MUTEX_UNLOCK(name) \	77	#define _THREAD_PRIVATE_MUTEX_UNLOCK(name) \
82	pthread_mutex_unlock(&__THREAD_MUTEX_NAME(name))	78	_libc_private_storage_unlock(&__THREAD_MUTEX_NAME(name))
83		79
84	/*	80	/* Declare a thread-private storage key. */
85	* A mutexed data structure used to hold the persistent state's key.
86	*/
87	struct _thread_private_key_struct {
88	struct pthread_mutex lockd;
89	pthread_mutex_t lock;
90	int init;
91	pthread_key_t key;
92	};
93
94	/*
95	* Declaration of a per-thread state key.
96	*/
97	#define _THREAD_PRIVATE_KEY(name) \	81	#define _THREAD_PRIVATE_KEY(name) \
98	static volatile struct _thread_private_key_struct \	82	static volatile struct _thread_private_key_struct \
99	__THREAD_KEY_NAME(name) = { \	83	__THREAD_KEY_NAME(name) = { \
100	PTHREAD_MUTEX_STATIC_INITIALIZER, \	84	PTHREAD_ONCE_INIT, \
101	&__THREAD_KEY_NAME(name).lockd, \
102	0 \	85	0 \
103	};	86	}
104		87
105	/*	88	/*
106	* Initialisation of storage space for a per-thread state variable.	89	* In threaded mode, return a pointer to thread-private memory of
107	* A pointer to a per-thread copy of the _initv parameter is returned.	90	* the same size as, and (initially) with the same contents as 'storage'. If
108	* It calls malloc the first time and the space is automatically free'd	91	* an error occurs, the 'error' parameter is returned.
109	* when the thread dies. If you need something a bit more complicated	92	* In single-threaded mode, no storage is allocated. Instead, a pointer
110	* than free() you will need to roll-your-own.	93	* to storage is always returned.
		94	* The 'cleanfn' function of the key structure is called to free the storage.
		95	* If 'cleanfn' is NULL, then free() is used. This hook can be useful for
		96	* getting rid of memory leaks.
111	*/	97	*/
112	#define _THREAD_PRIVATE(keyname, _initv, _errv) \	98	#define _THREAD_PRIVATE(keyname, storage, error) \
113	({ \	99	_libc_private_storage(&__THREAD_KEY_NAME(keyname), \
114	struct _thread_private_key_struct * __k = \	100	&(storage), sizeof (storage), error)
115	&__THREAD_KEY_NAME(keyname); \
116	void* __p; \
117	extern void free __P((void*)); \
118	extern void* malloc __P((size_t)); \
119	\
120	if (!__isthreaded) { \
121	/* non-threaded behaviour */ \
122	__p = &(_initv); \
123	goto _ok; \
124	} \
125	\
126	/* create key for first thread */ \
127	pthread_mutex_lock(&__k->lock); \
128	if (__k->init == 0) { \
129	if (pthread_key_create(&__k->key, free)) { \
130	pthread_mutex_unlock(&__k->lock); \
131	goto _err; \
132	} \
133	__k->init = 1; \
134	} \
135	pthread_mutex_unlock(&__k->lock); \
136	\
137	if ((__p = pthread_getspecific(__k->key)) == NULL) { \
138	/* alloc space on 1st call in this thread */ \
139	if ((__p = malloc(sizeof(_initv))) == NULL) \
140	goto _err; \
141	if (pthread_setspecific(__k->key, __p) != 0) { \
142	free(__p); \
143	goto _err; \
144	} \
145	/* initialise with _initv */ \
146	memcpy(__p, &_initv, sizeof(_initv)); \
147	} \
148	goto _ok; \
149	_err: \
150	__p = (_errv); \
151	_ok: \
152	__p; \
153	})
154		101
155	/*	102	/*
156	* Macros for locking and unlocking FILEs. These test if the	103	* Macros for locking and unlocking FILEs. These test if the
157	* process is threaded to avoid locking when not required.	104	* process is threaded to avoid locking when not required.
158	*/	105	*/
159	#define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)	106	#ifdef _FLOCK_DEBUG
160	#define FUNLOCKFILE(fp) if (__isthreaded) funlockfile(fp)	107	#define FLOCKFILE(fp) _flockfile_debug(fp, __FILE__, __LINE__)
161		108	#else
162	#else /* !_THREAD_SAFE */	109	#define FLOCKFILE(fp) flockfile(fp)
		110	#endif
		111	#define FUNLOCKFILE(fp) funlockfile(fp)
163		112
164	/*	113	/*
165	* Do-nothing macros for single-threaded case.	114	* File descriptor locking definitions.
166	*/	115	*/
167	#define _FD_LOCK(f,o,p) (0)	116	#define FD_READ 0x1
168	#define _FD_UNLOCK(f,o) /* nothing */	117	#define FD_WRITE 0x2
169	#define _THREAD_PRIVATE_KEY(_key) /* nothing */	118	#define FD_RDWR (FD_READ \| FD_WRITE)
170	#define _THREAD_PRIVATE(keyname, _initv, _errv) (&(_initv))	119
171	#define _THREAD_PRIVATE_MUTEX(_name) /* nothing */	120	#ifdef _LOCK_DEBUG
172	#define _THREAD_PRIVATE_MUTEX_LOCK(_name) /* nothing */	121	#define _FD_LOCK(_fd,_type,_ts) _thread_fd_lock_debug(_fd, _type, \
173	#define _THREAD_PRIVATE_MUTEX_UNLOCK(_name) /* nothing */	122	_ts, __FILE__, __LINE__)
174	#define FLOCKFILE(fp) /* nothing */	123	#define _FD_UNLOCK(_fd,_type) _thread_fd_unlock_debug(_fd, _type, \
175	#define FUNLOCKFILE(fp) /* nothing */	124	__FILE__, __LINE__)
176		125	#else
177	#endif /* !_THREAD_SAFE */	126	#define _FD_LOCK(_fd,_type,_ts) _thread_fd_lock(_fd, _type, _ts)
		127	#define _FD_UNLOCK(_fd,_type) _thread_fd_unlock(_fd, _type)
		128	#endif
		129
		130	int _thread_fd_lock(int, int, struct timespec *);
		131	int _thread_fd_lock_debug(int, int, struct timespec , const char , int);
		132	void _thread_fd_unlock(int, int);
		133	void _thread_fd_unlock_debug(int, int, const char *, int);
178		134
179	#endif _THREAD_PRIVATE_H_	135	#endif _THREAD_PRIVATE_H_