1// +build ignore
2
3/*
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are met:
6
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13
14 * Neither the name of "The Computer Language Benchmarks Game" nor the
15 name of "The Computer Language Shootout Benchmarks" nor the names of
16 its contributors may be used to endorse or promote products derived
17 from this software without specific prior written permission.
18
19THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29POSSIBILITY OF SUCH DAMAGE.
30*/
31
32/*
33* The Computer Language Benchmarks Game
34* http://shootout.alioth.debian.org/
35
36* contributed by Premysl Hruby
37*/
38
39#include <stdint.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <pthread.h>
43#include <string.h>
44#include <limits.h>
45
46// PTHREAD_STACK_MIN undeclared on mingw
47#ifndef PTHREAD_STACK_MIN
48#define PTHREAD_STACK_MIN 65535
49#endif
50
51#define THREADS (503)
52
53struct stack {
54 char x[PTHREAD_STACK_MIN];
55};
56
57
58/* staticaly initialize mutex[0] mutex */
59static pthread_mutex_t mutex[THREADS];
60static int data[THREADS];
61static struct stack stacks[THREADS];
62/* stacks must be defined staticaly, or my i386 box run of virtual memory for this
63 * process while creating thread +- #400 */
64
65static void* thread(void *num)
66{
67 int l = (int)(uintptr_t)num;
68 int r = (l+1) % THREADS;
69 int token;
70
71 while(1) {
72 pthread_mutex_lock(mutex + l);
73 token = data[l];
74 if (token) {
75 data[r] = token - 1;
76 pthread_mutex_unlock(mutex + r);
77 }
78 else {
79 printf("%i\n", l+1);
80 exit(0);
81 }
82 }
83}
84
85
86
87int main(int argc, char **argv)
88{
89 int i;
90 pthread_t cthread;
91 pthread_attr_t stack_attr;
92
93 if (argc != 2)
94 exit(255);
95 data[0] = atoi(argv[1]);
96
97 pthread_attr_init(&stack_attr);
98
99 for (i = 0; i < THREADS; i++) {
100 pthread_mutex_init(mutex + i, NULL);
101 pthread_mutex_lock(mutex + i);
102
103#if defined(__MINGW32__) || defined(__MINGW64__)
104 pthread_attr_setstackaddr(&stack_attr, &stacks[i]);
105 pthread_attr_setstacksize(&stack_attr, sizeof(struct stack));
106#else
107 pthread_attr_setstack(&stack_attr, &stacks[i], sizeof(struct stack));
108#endif
109
110 pthread_create(&cthread, &stack_attr, thread, (void*)(uintptr_t)i);
111 }
112
113 pthread_mutex_unlock(mutex + 0);
114 pthread_join(cthread, NULL);
115}
View as plain text