120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
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/*
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* C wrapper for poll().
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*/
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#define _GNU_SOURCE
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#if defined(_WIN32)
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#include <WinSock2.h>
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#define poll WSAPoll
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#pragma comment(lib, "ws2_32")
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#else
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#include <poll.h>
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#endif
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#include <time.h>
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#include "duktape.h"
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static int poll_poll(duk_context *ctx) {
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int timeout = duk_to_int(ctx, 1);
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int i, n, nchanged;
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int fd, rc;
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struct pollfd fds[20];
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struct timespec ts;
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memset(fds, 0, sizeof(fds));
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n = 0;
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duk_enum(ctx, 0, 0 /*enum_flags*/);
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while (duk_next(ctx, -1, 0)) {
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if ((size_t) n >= sizeof(fds) / sizeof(struct pollfd)) {
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return -1;
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}
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/* [... enum key] */
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duk_dup_top(ctx); /* -> [... enum key key] */
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duk_get_prop(ctx, 0); /* -> [... enum key val] */
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fd = duk_to_int(ctx, -2);
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duk_push_string(ctx, "events");
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duk_get_prop(ctx, -2); /* -> [... enum key val events] */
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fds[n].fd = fd;
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fds[n].events = duk_to_int(ctx, -1);
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fds[n].revents = 0;
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duk_pop_n(ctx, 3); /* -> [... enum] */
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n++;
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}
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/* leave enum on stack */
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memset(&ts, 0, sizeof(ts));
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ts.tv_nsec = (timeout % 1000) * 1000000;
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ts.tv_sec = timeout / 1000;
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/*rc = ppoll(fds, n, &ts, NULL);*/
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rc = poll(fds, n, timeout);
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if (rc < 0) {
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(void) duk_error(ctx, DUK_ERR_ERROR, "%s (errno=%d)", strerror(errno), errno);
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}
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duk_push_array(ctx);
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nchanged = 0;
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for (i = 0; i < n; i++) {
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/* update revents */
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if (fds[i].revents) {
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duk_push_int(ctx, fds[i].fd); /* -> [... retarr fd] */
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duk_put_prop_index(ctx, -2, nchanged);
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nchanged++;
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}
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duk_push_int(ctx, fds[i].fd); /* -> [... retarr key] */
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duk_get_prop(ctx, 0); /* -> [... retarr val] */
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duk_push_string(ctx, "revents");
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duk_push_int(ctx, fds[i].revents); /* -> [... retarr val "revents" fds[i].revents] */
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duk_put_prop(ctx, -3); /* -> [... retarr val] */
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duk_pop(ctx);
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}
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/* [retarr] */
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return 1;
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}
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static duk_function_list_entry poll_funcs[] = {
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{ "poll", poll_poll, 2 },
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{ NULL, NULL, 0 }
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};
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static duk_number_list_entry poll_consts[] = {
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{ "POLLIN", (double) POLLIN },
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{ "POLLPRI", (double) POLLPRI },
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{ "POLLOUT", (double) POLLOUT },
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#if 0
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/* Linux 2.6.17 and upwards, requires _GNU_SOURCE etc, not added
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* now because we don't use it.
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*/
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{ "POLLRDHUP", (double) POLLRDHUP },
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#endif
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{ "POLLERR", (double) POLLERR },
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{ "POLLHUP", (double) POLLHUP },
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{ "POLLNVAL", (double) POLLNVAL },
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{ NULL, 0.0 }
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};
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void poll_register(duk_context *ctx) {
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/* Set global 'Poll' with functions and constants. */
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duk_push_global_object(ctx);
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duk_push_object(ctx);
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duk_put_function_list(ctx, -1, poll_funcs);
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duk_put_number_list(ctx, -1, poll_consts);
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duk_put_prop_string(ctx, -2, "Poll");
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duk_pop(ctx);
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}
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