03_wait_for.c File Reference

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

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

Variables
static int	answer
static srn_fiber_t *	worker_fiber

Function Documentation

main()

int main

(

void

)

Definition at line 62 of file 03_wait_for.c.

               {
  SERENE_RUNTIME_INIT_WITH_SCHED(engine, sched, nullptr);
  srn_context_t *ctx = srn_context_make(engine);
 
  // Nothing runs until scheduled, so the join target can be wired after both
  // fibers exist. Scheduling order (not creation order) sets who runs first
  // on one worker, the waiter parks, then the worker finishes and wakes it.
  srn_fiber_t *waiting = srn_fiber_make(ctx, sched, "waiter", waiter, nullptr, 0);
  worker_fiber         = srn_fiber_make(ctx, sched, "worker", worker, nullptr, 0);
  srn_fiber_schedule(waiting);
  srn_fiber_schedule(worker_fiber);
 
  srn_sched_run(sched, 1);
 
  srn_context_release(ctx);
  SERENE_RUNTIME_SHUTDOWN(engine);
  return 0;
}

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waiter()

srn_fiber_result_t waiter ( srn_context_t * ctx, void * arg )

static

Definition at line 51 of file 03_wait_for.c.

                                                                {
  (void)ctx;
  (void)arg;
  printf("waiter: blocking on the worker\n");
  srn_fiber_result_t result = srn_fiber_wait_for(worker_fiber);
  printf(
    "waiter: worker produced %s\n", result == &answer ? "the expected value" : "an unexpected value"
  );
  return nullptr;
}

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worker()

srn_fiber_result_t worker ( srn_context_t * ctx, void * arg )

static

Definition at line 44 of file 03_wait_for.c.

                                                                {
  (void)ctx;
  (void)arg;
  printf("worker: computing\n");
  return &answer;
}

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Variable Documentation

answer

int answer

static

Definition at line 39 of file 03_wait_for.c.

worker_fiber

srn_fiber_t* worker_fiber

static

Definition at line 42 of file 03_wait_for.c.