Initial commit

- basic main.c implementation
- event_loop implementation

event_loop.c

@@ -0,0 +1,63 @@
+#include "event_loop.h"
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <sys/epoll.h>
+
+/*
+ * Macros
+ */
+#define MAX_EPOLL_EVENTS        (20)
+
+/*
+ * Data
+ */
+static int _efd = -1;
+static loop_cb_t _cb = NULL;
+static struct epoll_event _evs[MAX_EPOLL_EVENTS];
+
+/*
+ * Public API
+ */
+bool loop_init(loop_cb_t callback) {
+    _efd = epoll_create1(0);
+    if (_efd == -1) {
+        printf("[!] epoll_create1 failed: %d\n", errno);
+        return false;
+    }
+    _cb = callback;
+    return true;
+}
+
+void loop_deinit() {
+    close(_efd);
+}
+
+bool loop_ctl(int op, int fd, struct epoll_event *event) {
+    if (epoll_ctl(_efd, op, fd, event) == -1) {
+        printf("[!] epoll_ctl failed: %d\n", errno);
+        return false;
+    }
+    return true;
+}
+
+bool loop_wait() {
+    int result = epoll_wait(
+        _efd,
+        _evs,
+        MAX_EPOLL_EVENTS,
+        -1
+    );
+    if (result < 0) {
+        printf("[!] epoll_wait failed: %d\n", errno);
+        return false;
+    }
+    if (!result) {
+        return true;
+    }
+    for (int i = 0; i < result; ++i) {
+        _cb(_evs[i].data.fd, _evs[i].events);
+    }
+    return true;
+}