50 lines
789 B
C
50 lines
789 B
C
/* vim: tabstop=4 noexpandtab shiftwidth=4
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*
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* Multitasking Thrasher
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*
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <syscall.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main(int argc, char ** argv) {
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int nthreads = 2, base_pid = getpid(), npid = -1;
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if (argc > 1) {
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/* Read some arguments */
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int c;
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while ((c = getopt(argc, argv, "n:")) != -1) {
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switch (c) {
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case 'n':
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nthreads = atoi(optarg);
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break;
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default:
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break;
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}
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}
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}
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printf("I am pid %d\n", base_pid);
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printf("Starting %d threads.\n", nthreads);
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for (int i = 0; i < nthreads; ++i) {
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int pid = fork();
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if (!pid) {
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while (1) {
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printf("%c", i + 'A');
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fflush(stdout);
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}
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} else {
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npid = pid;
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}
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}
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printf("Done.\n");
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return 0;
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}
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