42 lines
862 B
C
42 lines
862 B
C
#define _GNU_SOURCE
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#include <pthread.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <unistd.h>
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static void *download(void *);
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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fprintf(stderr, "Usage: %s file1 file2...", argv[0]);
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return 1;
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}
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const int nfile = argc - 1;
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pthread_t workers[nfile];
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for (int i = 0; i < nfile; i++) {
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pthread_create(&workers[i], NULL, download, argv[i + 1]);
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}
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for (int i = 0; i < nfile; i++) {
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pthread_join(workers[i], NULL);
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}
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printf("All downloads complete.\n");
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return 0;
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}
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static void *download(void *arg)
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{
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char *uri = (char *)arg;
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int tid = syscall(SYS_gettid);
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printf("[Thread %x] Starting download of %s\n", tid, uri);
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sleep(rand() % 3 + 1);
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printf("[Thread %x] Finished download of %s\n", tid, uri);
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pthread_exit(0);
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}
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