src/nvim/event/loop.h


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#ifndef NVIM_EVENT_LOOP_H
#define NVIM_EVENT_LOOP_H

#include <stdint.h>

#include <uv.h>

#include "nvim/lib/klist.h"
#include "nvim/os/time.h"
#include "nvim/event/queue.h"

typedef void * WatcherPtr;

#define _noop(x)
KLIST_INIT(WatcherPtr, WatcherPtr, _noop)

typedef struct loop {
  uv_loop_t uv;
  Queue *events, *fast_events;
  klist_t(WatcherPtr) *children;
  uv_signal_t children_watcher;
  uv_timer_t children_kill_timer, poll_timer;
  size_t children_stop_requests;
} Loop;

#define CREATE_EVENT(queue, handler, argc, ...)                  \
  do {                                                           \
    if (queue) {                                                 \
      queue_put((queue), (handler), argc, __VA_ARGS__);          \
    } else {                                                     \
      void *argv[argc] = {__VA_ARGS__};                          \
      (handler)(argv);                                           \
    }                                                            \
  } while (0)

// Poll for events until a condition or timeout
#define LOOP_PROCESS_EVENTS_UNTIL(loop, queue, timeout, condition)           \
  do {                                                                       \
    int remaining = timeout;                                                 \
    uint64_t before = (remaining > 0) ? os_hrtime() : 0;                     \
    while (!(condition)) {                                                   \
      LOOP_PROCESS_EVENTS(loop, queue, remaining);                           \
      if (remaining == 0) {                                                  \
        break;                                                               \
      } else if (remaining > 0) {                                            \
        uint64_t now = os_hrtime();                                          \
        remaining -= (int) ((now - before) / 1000000);                       \
        before = now;                                                        \
        if (remaining <= 0) {                                                \
          break;                                                             \
        }                                                                    \
      }                                                                      \
    }                                                                        \
  } while (0)

#define LOOP_PROCESS_EVENTS(loop, queue, timeout)                            \
  do {                                                                       \
    if (queue && !queue_empty(queue)) {                                      \
      queue_process_events(queue);                                           \
    } else {                                                                 \
      loop_poll_events(loop, timeout);                                       \
    }                                                                        \
  } while (0)


#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "event/loop.h.generated.h"
#endif

#endif  // NVIM_EVENT_LOOP_H