/* lockutw3.c: LOCK UTILIZATION TEST
*
* $Id: //info.ravenbrook.com/project/mps/branch/2013-05-01/keyword-arguments/code/lockutw3.c#2 $
* Copyright (c) 2001-2013 Ravenbrook Limited. See end of file for license.
*/
#include "mpm.h"
#include "testlib.h"
#include "mpswin.h"
#ifndef MPS_OS_W3
#error "Relies on Win32 threads"
#endif
#define nTHREADS 4
static Lock lock;
unsigned long shared, tmp;
void incR(unsigned long i)
{
LockClaimRecursive(lock);
if (i < 100) {
while(i--) {
tmp = shared;
shared = tmp + 1;
}
} else {
incR(i >> 1);
incR( (i+1) >> 1);
}
LockReleaseRecursive(lock);
}
void inc(unsigned long i)
{
incR( (i+1) >>1);
i >>= 1;
while (i) {
LockClaim(lock);
if (i > 10000) {
incR(5000);
i -= 5000;
}
tmp = shared;
shared = tmp+1;
i--;
LockReleaseMPM(lock);
}
}
#define COUNT 100000l
DWORD WINAPI thread0(void *p)
{
(void)p;
inc(COUNT);
return 0;
}
int main(int argc, char *argv[])
{
DWORD id;
HANDLE t[10];
unsigned i;
lock = malloc(LockSize());
Insist(lock != NULL);
LockInit(lock);
UNUSED(argc);
shared = 0;
for(i = 0; i < nTHREADS; i++)
t[i] = CreateThread(NULL, 0, thread0, NULL, 0, &id);
for(i = 0; i < nTHREADS; i++)
WaitForSingleObject(t[i], INFINITE);
Insist(shared == nTHREADS*COUNT);
LockFinish(lock);
printf("%s: Conclusion: Failed to find any defects.\n", argv[0]);
return 0;
}
/* C. COPYRIGHT AND LICENSE
*
* Copyright (c) 2001-2013 Ravenbrook Limited <http://www.ravenbrook.com/>.
* All rights reserved. This is an open source license. Contact
* Ravenbrook for commercial licensing options.
*
* 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.
*
* 3. Redistributions in any form must be accompanied by information on how
* to obtain complete source code for this software and any accompanying
* software that uses this software. The source code must either be
* included in the distribution or be available for no more than the cost
* of distribution plus a nominal fee, and must be freely redistributable
* under reasonable conditions. For an executable file, complete source
* code means the source code for all modules it contains. It does not
* include source code for modules or files that typically accompany the
* major components of the operating system on which the executable file
* runs.
*
* 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, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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*/