55 lines
898 B
C
55 lines
898 B
C
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/*
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* libucontext test program based on POSIX example program.
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* Public domain.
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*/
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#include <stdio.h>
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#include <ucontext.h>
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#include <stdint.h>
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#include <string.h>
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static ucontext_t ctx[3];
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static void f1 (void) {
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printf("start f1\n");
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swapcontext(&ctx[1], &ctx[2]);
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printf("finish f1\n");
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}
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static void f2 (void) {
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printf("start f2\n");
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swapcontext(&ctx[2], &ctx[1]);
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printf("finish f2\n");
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}
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int main (int argc, const char *argv[]) {
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char st1[8192];
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char st2[8192];
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memset(st1, 'A', sizeof st1);
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memset(st2, 'B', sizeof st2);
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getcontext(&ctx[1]);
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ctx[1].uc_stack.ss_sp = st1;
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ctx[1].uc_stack.ss_size = sizeof st1;
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ctx[1].uc_link = &ctx[0];
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makecontext(&ctx[1], f1, 0);
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getcontext(&ctx[2]);
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ctx[2].uc_stack.ss_sp = st2;
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ctx[2].uc_stack.ss_size = sizeof st2;
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ctx[2].uc_link = &ctx[1];
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makecontext(&ctx[2], f2, 0);
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swapcontext(&ctx[0], &ctx[2]);
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return 0;
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}
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