Initial version.

src/nxt_chan.h

@@ -0,0 +1,73 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_UNIX_CHAN_H_INCLUDED_
+#define _NXT_UNIX_CHAN_H_INCLUDED_
+
+
+typedef struct {
+    uint32_t            stream;
+
+    uint16_t            type;
+    uint8_t             last;      /* 1 bit */
+} nxt_chan_msg_t;
+
+
+typedef struct {
+    nxt_queue_link_t    link;
+    nxt_buf_t           *buf;
+    size_t              share;
+    nxt_fd_t            fd;
+    nxt_chan_msg_t      chan_msg;
+} nxt_chan_send_msg_t;
+
+
+typedef struct nxt_chan_recv_msg_s  nxt_chan_recv_msg_t;
+typedef void (*nxt_chan_handler_t)(nxt_thread_t *thr, nxt_chan_recv_msg_t *msg);
+
+
+typedef struct {
+    /* Must be the first field. */
+    nxt_event_fd_t      socket;
+
+    nxt_queue_t         messages;   /* of nxt_chan_send_msg_t */
+
+    /* Maximum size of message part. */
+    uint32_t            max_size;
+    /* Maximum interleave of message parts. */
+    uint32_t            max_share;
+
+    nxt_chan_handler_t  handler;
+    void                *data;
+
+    nxt_mem_pool_t      *mem_pool;
+    nxt_buf_t           *free_bufs;
+    nxt_socket_t        pair[2];
+} nxt_chan_t;
+
+
+struct nxt_chan_recv_msg_s {
+    uint32_t            stream;
+    uint16_t            type;
+
+    nxt_fd_t            fd;
+    nxt_buf_t           *buf;
+    nxt_chan_t          *chan;
+};
+
+
+NXT_EXPORT nxt_chan_t *nxt_chan_alloc(void);
+NXT_EXPORT nxt_chan_t *nxt_chan_create(size_t bufsize);
+NXT_EXPORT void nxt_chan_destroy(nxt_chan_t *chan);
+NXT_EXPORT void nxt_chan_write_enable(nxt_thread_t *thr, nxt_chan_t *chan);
+NXT_EXPORT void nxt_chan_write_close(nxt_chan_t *chan);
+NXT_EXPORT void nxt_chan_read_enable(nxt_thread_t *thr, nxt_chan_t *chan);
+NXT_EXPORT void nxt_chan_read_close(nxt_chan_t *chan);
+NXT_EXPORT nxt_int_t nxt_chan_write(nxt_chan_t *chan, nxt_uint_t type,
+    nxt_fd_t fd, uint32_t stream, nxt_buf_t *b);
+
+
+#endif /* _NXT_UNIX_CHAN_H_INCLUDED_ */