Home | History | Annotate | Download | only in inc
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef	_MTLIB_H
     28 #define	_MTLIB_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #include <thread.h>
     33 
     34 #ifdef	__cplusplus
     35 extern "C" {
     36 #endif
     37 
     38 /* these are private to the library */
     39 extern	int	primary_link_map;
     40 extern	void	lmutex_lock(mutex_t *);
     41 extern	void	lmutex_unlock(mutex_t *);
     42 extern	void	lrw_rdlock(rwlock_t *);
     43 extern	void	lrw_wrlock(rwlock_t *);
     44 extern	void	lrw_unlock(rwlock_t *);
     45 extern	void	sig_mutex_lock(mutex_t *);
     46 extern	void	sig_mutex_unlock(mutex_t *);
     47 extern	int	sig_mutex_trylock(mutex_t *);
     48 extern	int	sig_cond_wait(cond_t *, mutex_t *);
     49 extern	int	sig_cond_reltimedwait(cond_t *, mutex_t *, const timespec_t *);
     50 extern	void	cancel_safe_mutex_lock(mutex_t *);
     51 extern	void	cancel_safe_mutex_unlock(mutex_t *);
     52 extern	int	cancel_safe_mutex_trylock(mutex_t *);
     53 extern	int	cancel_active(void);
     54 extern	int	_thrp_cancelled(void);
     55 
     56 /* the private libc thread-safe allocator */
     57 extern	void	*lmalloc(size_t);
     58 extern	void	lfree(void *, size_t);
     59 
     60 #if defined(THREAD_DEBUG)
     61 extern	void	assert_no_libc_locks_held(void);
     62 #else
     63 #define	assert_no_libc_locks_held()
     64 #endif
     65 
     66 #define	_FWRITE _fwrite_unlocked
     67 #define	FILENO(s) _fileno(s)
     68 #define	FERROR(s) ferror(s)
     69 #define	GETC(s) _getc_unlocked(s)
     70 #define	UNGETC(c, s) _ungetc_unlocked(c, s)
     71 #define	PUTC(c, s) _putc_unlocked(c, s)
     72 #define	GETWC(s) getwc(s)
     73 #define	PUTWC(c, s) putwc(c, s)
     74 
     75 /*
     76  * Cheap check to tell if stdio needs to lock for MT progs.
     77  * Referenced directly in port/stdio/flush.c and FLOCKFILE and
     78  * FUNLOCKFILE macros.  __libc_threaded gets set to 1 when the first
     79  * thread (beyond the main thread) is created in _thrp_create().
     80  */
     81 extern	int	__libc_threaded;
     82 
     83 #define	FILELOCKING(iop)	(GET_IONOLOCK(iop) == 0)
     84 
     85 #define	FLOCKFILE(lk, iop) \
     86 	{ \
     87 		if (__libc_threaded && FILELOCKING(iop)) \
     88 			lk = _flockget((iop)); \
     89 		else \
     90 			lk = NULL; \
     91 	}
     92 
     93 #define	FUNLOCKFILE(lk) \
     94 	{ \
     95 		if (lk != NULL) \
     96 			_flockrel(lk); \
     97 	}
     98 
     99 #define	FLOCKRETURN(iop, ret) \
    100 	{	int r; \
    101 		rmutex_t *lk; \
    102 		FLOCKFILE(lk, iop); \
    103 		r = (ret); \
    104 		FUNLOCKFILE(lk); \
    105 		return (r); \
    106 	}
    107 
    108 #ifdef	__cplusplus
    109 }
    110 #endif
    111 
    112 #endif	/* _MTLIB_H */
    113