--- /dev/null
+/*
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ * 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.
+
+ * Neither the name of "The Computer Language Benchmarks Game" nor the
+ name of "The Computer Language Shootout Benchmarks" nor the names of
+ its contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+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 OWNER 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.
+*/
+
+/*
+* The Computer Language Benchmarks Game
+* http://shootout.alioth.debian.org/
+
+* contributed by Premysl Hruby
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <limits.h>
+
+#define THREADS (503)
+
+
+struct stack {
+ char x[PTHREAD_STACK_MIN];
+};
+
+
+/* staticaly initialize mutex[0] mutex */
+static pthread_mutex_t mutex[THREADS];
+static int data[THREADS];
+static struct stack stacks[THREADS];
+/* stacks must be defined staticaly, or my i386 box run of virtual memory for this
+ * process while creating thread +- #400 */
+
+static void* thread(void *num)
+{
+ int l = (int)num;
+ int r = (l+1) % THREADS;
+ int token;
+
+ while(1) {
+ pthread_mutex_lock(mutex + l);
+ token = data[l];
+ if (token) {
+ data[r] = token - 1;
+ pthread_mutex_unlock(mutex + r);
+ }
+ else {
+ printf("%i\n", l+1);
+ exit(0);
+ }
+ }
+}
+
+
+
+int main(int argc, char **argv)
+{
+ int i;
+ pthread_t cthread;
+ pthread_attr_t stack_attr;
+
+ if (argc != 2)
+ exit(255);
+ data[0] = atoi(argv[1]);
+
+ pthread_attr_init(&stack_attr);
+
+ for (i = 0; i < THREADS; i++) {
+ pthread_mutex_init(mutex + i, NULL);
+ pthread_mutex_lock(mutex + i);
+
+ pthread_attr_setstack(&stack_attr, &stacks[i], sizeof(struct stack));
+ pthread_create(&cthread, &stack_attr, thread, (void*)i);
+ }
+
+ pthread_mutex_unlock(mutex + 0);
+ pthread_join(cthread, NULL);
+}
--- /dev/null
+/*
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ * 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.
+
+ * Neither the name of "The Computer Language Benchmarks Game" nor the
+ name of "The Computer Language Shootout Benchmarks" nor the names of
+ its contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+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 OWNER 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.
+*/
+
+/* The Computer Language Benchmarks Game
+ * http://shootout.alioth.debian.org/
+ *
+ * contributed by The Go Authors.
+ */
+
+package main
+
+import (
+ "flag";
+ "fmt";
+ "os";
+ "time";
+)
+
+var n = flag.Int("n", 1000, "how many passes")
+
+const Nthread = 503
+
+func f(i int, in <-chan int, out chan<- int) {
+ for {
+ n := <-in;
+ if n == 0 {
+ fmt.Printf("%d\n", i);
+ os.Exit(0);
+ }
+ out <- n - 1
+ }
+}
+
+func main() {
+ flag.Parse();
+
+ one := make(chan int); // will be input to thread 1
+ var in, out chan int = nil, one;
+ for i := 1; i <= Nthread-1; i++ {
+ in, out = out, make(chan int);
+ go f(i, in, out);
+ }
+ go f(Nthread, out, one);
+ one <- *n;
+ for {
+ time.Sleep(100*1e9); // wait for ring to run
+ }
+}