vthread.h revision 1
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#ifndef _VTHREAD_H
#define _VTHREAD_H 1
#define VTHREAD_VERSION 20001201L
/* Header for the Vthread library.
** Note that the macro vt_threaded may be defined
** outside of vthread.h to suppress threading.
**
** Written by Kiem-Phong Vo, kpv@research.att.com
*/
#include <ast_common.h>
#include <errno.h>
/* ast doesn't do threads yet */
#if _PACKAGE_ast && !defined(vt_threaded)
#define vt_threaded 0
#endif
#define _may_use_threads 1
#else
#define _may_use_threads 0
#endif
#define vt_threaded 1
#include <pthread.h>
typedef pthread_mutex_t _vtmtx_t;
typedef pthread_once_t _vtonce_t;
typedef pthread_attr_t _vtattr_t;
#if !defined(PTHREAD_ONCE_INIT) && defined(pthread_once_init)
#define PTHREAD_ONCE_INIT pthread_once_init
#endif
#endif
#define vt_threaded 1
#include <windows.h>
typedef CRITICAL_SECTION _vtmtx_t;
typedef int _vtonce_t;
typedef SECURITY_ATTRIBUTES _vtattr_t;
#endif
#ifndef vt_threaded
#define vt_threaded 0
#endif
/* common attributes for various structures */
/* directives for vtset() */
typedef struct _vtmutex_s Vtmutex_t;
typedef struct _vthread_s Vthread_t;
#ifndef EINVAL
#define EINVAL 22
#endif
#ifndef EBUSY
#define EBUSY 16
#endif
#ifndef EDEADLK
#define EDEADLK 45
#endif
#ifndef EPERM
#define EPERM 1
#endif
#if vt_threaded
/* mutex structure */
struct _vtmutex_s
int count;
int state;
int error;
};
/* structure for states of thread */
struct _vthread_s
int state; /* execution state */
int error; /* error status */
};
/* structure for exactly once execution */
struct _vtonce_s
{ int done;
int error;
};
#if _WIN32
#define VTONCE_INITDATA {0, 0}
#else
#define VTONCE_INITDATA {0, PTHREAD_ONCE_INIT }
#endif
#endif /*vt_threaded*/
/* fake structures and functions */
#if !vt_threaded
struct _vtmutex_s
{ int error;
};
struct _vtattr_s
{ int error;
};
struct _vthread_s
{ int error;
};
struct _vtonce_s
{ int error;
};
typedef int _vtmtx_t;
typedef int _vtonce_t;
typedef int _vtself_t;
typedef int _vtid_t;
typedef int _vtattr_t;
#define VTONCE_INITDATA {0}
#define vtmtxerror(mtx) (0)
#define vtonceerror(once) (0)
#endif /*!vt_threaded*/
#endif /*_VTHREAD_H*/