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/* testthr.h: MULTI-THREADED TEST INTERFACE
*
* $Id$
* Copyright (c) 2014-2020 Ravenbrook Limited. See end of file for license.
*
* .purpose: Simple interface to threads that makes it possible to
* write test cases that are portable between Windows (using the
* implementation in testthrw3.c) and Unix (using the implementation
* in testthrix.c). <design/testthr>.
*/
#ifndef testthr_h
#define testthr_h
#include "mpstd.h"
/* testthr_routine_t -- type of thread routines
*
* Use the pthread type here and convert back and forth in the Windows
* implementation.
*/
typedef void *(*testthr_routine_t)(void *);
/* testthr_t -- type of thread identifiers
*
* It is necessary to define it here (even though it requires some
* #ifdefs) so that clients can allocate storage for them.
*/
#if defined(MPS_OS_W3)
#include "mpswin.h"
/* On Windows, a thread is identified by a HANDLE.
* <https://docs.microsoft.com/en-gb/windows/desktop/WinProg/windows-data-types>
* But use a structure so that the thread has somewhere to store its
* result for use by testthr_join.
*/
typedef struct testthr_t {
HANDLE handle;
testthr_routine_t start;
void *arg; /* argument to pass to start */
void *result; /* result returned from start */
} testthr_t;
#elif defined(MPS_OS_FR) || defined(MPS_OS_LI) || defined(MPS_OS_XC)
#include <pthread.h>
/* In pthreads, a thread is identified by a pthread_t, which is
* allowed "to be defined as a structure" [IEEE Std 1003.1, sys/types.h]
* <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html>
*/
typedef pthread_t testthr_t;
#else
#error "Unknown platform: can't determine a type for testthr_t."
#endif
/* testthr_create -- create a thread
*
* Store the identifier of the newly created thread in *thread_o, and
* call start, passing arg as the single parameter.
*/
void testthr_create(testthr_t *thread_o, testthr_routine_t start, void *arg);
/* testthr_join -- wait for a thread to complete
*
* Suspend execution of the calling thread until the target thread
* terminates (if necessary), and if result_o is non-NULL, update
* *result_o with the return value of the thread's start.
*/
void testthr_join(testthr_t *thread, void **result_o);
#endif /* testthr_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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