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/* pthreadext.h: POSIX THREAD EXTENSIONS
*
* $Id$
* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
*
* .readership: MM developers.
*
* .purpose: Provides extension to Pthreads.
*/
#ifndef pthreadext_h
#define pthreadext_h
#include <signal.h>
#include "mpm.h"
#define PThreadextSig ((Sig)0x519B286E) /* SIGnature PTHReadExt */
/* PThreadext -- extension datatype */
typedef struct PThreadextStruct *PThreadext;
/* PThreadextStruct -- structure definition
*
* Should be embedded in a client structure
*/
typedef struct PThreadextStruct {
Sig sig; /* design.mps.sig.field */
pthread_t id; /* Thread ID */
MutatorContext context; /* context if suspended */
RingStruct threadRing; /* ring of suspended threads */
RingStruct idRing; /* duplicate suspensions for id */
} PThreadextStruct;
/* PThreadextCheck -- Check a pthreadext */
extern Bool PThreadextCheck(PThreadext pthreadext);
/* PThreadextInit -- Initialize a pthreadext */
extern void PThreadextInit(PThreadext pthreadext, pthread_t id);
/* PThreadextFinish -- Finish a pthreadext */
extern void PThreadextFinish(PThreadext pthreadext);
/* PThreadextSuspend -- Suspend a pthreadext and return its context. */
extern Res PThreadextSuspend(PThreadext pthreadext,
MutatorContext *contextReturn);
/* PThreadextResume -- Resume a suspended pthreadext */
extern Res PThreadextResume(PThreadext pthreadext);
#endif /* pthreadext_h */
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
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