Begin work on GIP (Graphics Initiation Protocol)

1 files changed, 47 insertions, 0 deletions

diff --git a/src/lib/include/mainloop.h b/src/lib/include/mainloop.h
new file mode 100644
index 0000000..1e71ffb
--- /dev/null
+++ b/src/lib/include/mainloop.h
@@ -0,0 +1,47 @@
+#pragma once
+
+// These functions are not thread safe, their purpose
+// is to multiplex several IO operations on a
+// single thread.
+
+#include <syscall.h>
+
+#define MAINLOOP_MAX_WR_BUFS 4
+
+typedef struct mainloop_fd mainloop_fd_t;
+
+typedef void (*buf_full_callback_t)(mainloop_fd_t *fd);
+typedef void (*fd_error_callback_t)(mainloop_fd_t *fd);
+
+typedef struct {
+	size_t size, written;
+	void* buf;
+	bool must_free;
+} mainloop_wr_buf_t;
+
+typedef struct mainloop_fd {
+	fd_t fd;
+	
+	size_t rd_buf_expect_size, rd_buf_filled;
+	void* rd_buf;
+
+	mainloop_wr_buf_t wr_bufs[MAINLOOP_MAX_WR_BUFS];
+
+	void* data;
+
+	buf_full_callback_t rd_on_full;
+	fd_error_callback_t on_error;
+
+	mainloop_fd_t *next;
+} mainloop_fd_t;
+
+void mainloop_add_fd(mainloop_fd_t* fd);
+void mainloop_rm_fd(mainloop_fd_t* fd);
+
+void mainloop_expect(mainloop_fd_t *fd, void* buf, size_t size, buf_full_callback_t cb);
+bool mainloop_nonblocking_write(mainloop_fd_t *fd, void* buf, size_t size, bool must_free_buf);
+
+void mainloop_run();
+void mainloop_exit();
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/