02_yield.c File Reference

#include <stdio.h>
#include <serene/runtime.h>

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Functions
static srn_fiber_result_t	counter (srn_context_t *ctx, void *arg)
int	main (void)

Variables
static int	ok

Function Documentation

counter()

static srn_fiber_result_t counter ( srn_context_t * ctx, void * arg )

static

Definition at line 37 of file 02_yield.c.

                                                                 {
  (void)ctx;
  // The argument carries the fiber's label, passed as a small integer.
  long id = (long)(intptr_t)arg;
  for (int step = 1; step <= 3; step++) {
    printf("fiber %ld: step %d\n", id, step);
    // Hand the worker to the next ready fiber. This fiber resumes here on its
    // next turn.
    srn_fiber_yield();
  }
  printf("fiber %ld: done\n", id);
  return &ok;
}

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main()

int main

(

void

)

Definition at line 51 of file 02_yield.c.

               {
  srn_mm_t *mm = srn_mm_init();
  srn_engine_t *engine = srn_engine_make(mm);
  srn_context_t *ctx = srn_context_make(engine);
  srn_scheduler_t *sched = engine->scheduler;
 
  for (long id = 1; id <= 3; id++) {
    (void)srn_fiber_make(ctx, sched, counter, (void *)(intptr_t)id, 0);
  }
 
  // One worker, so the turn taking is deterministic and the output interleaves
  // the three fibers a step at a time.
  srn_sched_run(sched, 1);
 
  srn_context_release(ctx);
  srn_engine_shutdown(engine);
  srn_mm_shutdown(mm);
  return 0;
}

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Variable Documentation

ok

int ok

static

Definition at line 35 of file 02_yield.c.