73 lines
3.2 KiB
C
73 lines
3.2 KiB
C
#ifndef FUSED_EVENTS_H
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#define FUSED_EVENTS_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <sys/epoll.h>
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#include "ws_client.h"
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#include "queue.h"
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#define MAX_EPOLL_FDS 64
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/* Identifies the type of a tracked file descriptor */
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typedef enum {
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FD_TYPE_WS, /* WebSocket connection */
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FD_TYPE_TIMER, /* timerfd */
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FD_TYPE_EVENT, /* eventfd for queue wakeup */
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FD_TYPE_UNIX_SERVER, /* unix domain socket server */
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FD_TYPE_HTTP_SERVER, /* HTTP server socket */
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FD_TYPE_UNIX_CLIENT /* unix domain socket client */
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} fd_type_t;
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/* A file descriptor tracked by the epoll event loop */
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typedef struct {
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int fd; /* the file descriptor */
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fd_type_t type; /* type identifier for dispatch */
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uint32_t ws_conn_idx; /* WebSocket connection index (if type is FD_TYPE_WS) */
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void *user_data; /* optional user data pointer */
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} tracked_fd_t;
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/* Epoll-based event set for a group of file descriptors */
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typedef struct {
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int epoll_fd; /* epoll instance fd */
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struct epoll_event events[MAX_EPOLL_FDS]; /* re-usable event array */
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tracked_fd_t fds[MAX_EPOLL_FDS]; /* tracked fd descriptors */
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uint32_t fd_count; /* number of tracked fds */
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} epoll_set_t;
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/* Top-level event loop state, split into hot (ws) and cold (timer/http) paths */
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typedef struct {
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epoll_set_t hot_epoll; /* hot epoll set for latency-sensitive ws events */
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epoll_set_t cold_epoll; /* cold epoll set for timer/http events */
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ws_client_t *ws_client; /* WebSocket client instance */
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spsc_queue_t *signal_queue; /* signal queue for emitting opportunities */
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int unix_server_fd; /* unix domain server socket */
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int unix_client_fd; /* unix domain client socket */
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int http_server_fd; /* HTTP server socket */
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int timer_fd; /* timerfd for periodic tasks */
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int wakeup_fd; /* eventfd for waking the cold loop */
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uint64_t next_ping_ms; /* next scheduled WebSocket ping timestamp */
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bool running; /* false signals event loops to exit */
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} event_loops_t;
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/* Initialise both epoll sets, create sockets, and start event loops */
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int event_loops_init(event_loops_t *loops, ws_client_t *ws_client,
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spsc_queue_t *signal_queue, const config_t *cfg, int wakeup_fd);
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/* Tear down event loops, close all sockets */
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void event_loops_destroy(event_loops_t *loops);
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/* Register a file descriptor with an epoll set */
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int event_loops_add_fd(epoll_set_t *set, int fd, fd_type_t type,
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uint32_t ws_idx, void *user_data, uint32_t events);
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/* Remove a file descriptor from an epoll set */
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void event_loops_remove_fd(epoll_set_t *set, int fd);
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/* Hot event loop thread: handles WebSocket I/O */
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void *event_hot_thread(void *arg);
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/* Cold event loop thread: handles timers, HTTP, and signal dispatch */
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void *event_cold_thread(void *arg);
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/* Connect to a unix domain socket (non-blocking) */
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int unix_client_connect(const char *socket_path);
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/* Create and listen on a unix domain socket */
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int unix_server_create(const char *socket_path);
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#endif
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