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reactor.c
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reactor.c
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#include "gc.h"
#include "sugar.h"
#include "reactor.h"
#include "internal.h" // IWYU pragma: keep
#include "modules/fs.h"
#include "modules/timer.h"
#include "modules/fetch.h"
#include "modules/child_process.h"
#include "modules/readline.h"
#include "modules/process.h"
static reactor_poll_hook_t g_poll_hook = NULL;
static void *g_poll_hook_data = NULL;
static inline work_flags_t get_pending_work(void) {
work_flags_t flags = 0;
if (has_pending_microtasks()) flags |= WORK_MICROTASKS;
if (has_pending_timers()) flags |= WORK_TIMERS;
if (has_pending_immediates()) flags |= WORK_IMMEDIATES;
if (has_pending_coroutines()) flags |= WORK_COROUTINES;
if (has_ready_coroutines()) flags |= WORK_COROUTINES_READY;
if (has_pending_fetches()) flags |= WORK_FETCHES;
if (has_pending_fs_ops()) flags |= WORK_FS_OPS;
if (has_pending_child_processes()) flags |= WORK_CHILD_PROCS;
if (has_active_readline_interfaces()) flags |= WORK_READLINE;
if (has_active_stdin()) flags |= WORK_STDIN;
return flags;
}
static inline bool event_loop_alive(void) {
work_flags_t w = get_pending_work();
if (w & (WORK_PENDING & ~WORK_COROUTINES)) return true;
if ((w & WORK_COROUTINES) && (w & WORK_COROUTINES_READY)) return true;
return UV_CHECK_ALIVE;
}
void js_reactor_set_poll_hook(reactor_poll_hook_t hook, void *data) {
g_poll_hook = hook;
g_poll_hook_data = data;
}
void js_poll_events(ant_t *js) {
coros_this_tick = 0;
process_immediates(js);
process_microtasks(js);
for (;;) {
coroutine_t *temp = NULL;
for (coroutine_t *c = pending_coroutines.head; c; c = c->next) {
if (c->is_ready && c->mco && mco_status(c->mco) == MCO_SUSPENDED) { temp = c; break; }
}
if (!temp) break;
temp->is_ready = false;
mco_result res;
MCO_RESUME_SAVE(js, temp->mco, res);
if (res != MCO_SUCCESS || mco_status(temp->mco) == MCO_DEAD) {
remove_coroutine(temp);
free_coroutine(temp);
}
}
if (js->needs_gc) js_gc_maybe(js);
if (g_poll_hook) g_poll_hook(g_poll_hook_data);
}
void js_run_event_loop(ant_t *js) {
drain:
while (event_loop_alive()) {
js_poll_events(js);
work_flags_t work = get_pending_work();
if (work & WORK_BLOCKING) uv_run(uv_default_loop(), UV_RUN_NOWAIT);
else if ((work & WORK_ASYNC) || UV_CHECK_ALIVE) {
js_gc_maybe(js);
uv_run(uv_default_loop(), UV_RUN_ONCE);
} else break;
}
js_poll_events(js);
jsval_t code = js_mknum(0);
emit_process_event("beforeExit", &code, 1);
if (event_loop_alive()) goto drain;
}

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