Lean and mean initial commit

Not much functionality yet

1 files changed, 43 insertions, 0 deletions

diff --git a/epoll.c b/epoll.c
new file mode 100644
index 0000000..576fb0e
--- /dev/null
+++ b/epoll.c
@@ -0,0 +1,43 @@
+#include "epoll.h"
+#include <errno.h>
+
+static int efd = -1;
+#define MAXEVENTS 10
+static struct epoll_event events[MAXEVENTS];
+
+int ePoll_init()
+{
+	if (efd != -1) return 0;
+	efd = epoll_create1(0);
+	if (efd == -1) return -1;
+	return 0;
+}
+
+int ePoll_wait(const int timeoutMs)
+{
+		const int num = epoll_wait(efd, events, MAXEVENTS, timeoutMs);
+		if (num < 0 && (errno == EINTR || errno == EAGAIN)) return 0;
+		if (num < 0) return -1;
+		for (int i = 0; i < num; ++i) {
+			epoll_item_t *data = (epoll_item_t *)events[i].data.ptr;
+			(*data->callback)(data, events[i].events & EPOLLIN, events[i].events & EPOLLOUT, events[i].events & (EPOLLERR | EPOLLHUP));
+		}
+		return 0;
+}
+
+/**
+ * Returns -1 on error, just like epoll_ctl
+ */
+int ePoll_add(uint32_t flags, epoll_item_t* callback)
+{
+	struct epoll_event event;
+	event.data.ptr = (void*)callback;
+	event.events = flags;
+	return epoll_ctl(efd, EPOLL_CTL_ADD, callback->fd, &event);
+}
+
+int ePoll_remove(int fd)
+{
+	return epoll_ctl(efd, EPOLL_CTL_DEL, fd, (struct epoll_event*)67775);
+}
+