1 files changed, 68 insertions, 0 deletions
diff --git a/src/nxt_process_chan.h b/src/nxt_process_chan.h
new file mode 100644
index 00000000..a073e3dd
--- /dev/null
+++ b/src/nxt_process_chan.h
@@ -0,0 +1,68 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_PROCESS_CHAN_H_INCLUDED_
+#define _NXT_PROCESS_CHAN_H_INCLUDED_
+
+
+#define NXT_CHAN_MSG_MAX  NXT_CHAN_MSG_DATA
+
+typedef enum {
+    NXT_CHAN_MSG_QUIT = 0,
+    NXT_CHAN_MSG_NEW_CHAN,
+    NXT_CHAN_MSG_CHANGE_FILE,
+    NXT_CHAN_MSG_DATA,
+} nxt_chan_msg_type_e;
+
+
+typedef struct {
+    nxt_pid_t   pid;
+    uint32_t    engine;
+    uint32_t    generation;
+    nxt_chan_t  *chan;
+} nxt_process_chan_t;
+
+
+typedef struct {
+    nxt_pid_t   pid;
+    uint32_t    engine;
+    size_t      max_size;
+    size_t      max_share;
+} nxt_proc_msg_new_chan_t;
+
+
+/*
+ * nxt_process_chan_data_t is allocaiton size
+ * enabling effective reuse of memory pool cache.
+ */
+typedef union {
+    nxt_buf_t                buf;
+    nxt_proc_msg_new_chan_t  new_chan;
+} nxt_process_chan_data_t;
+
+
+typedef void (*nxt_process_chan_handler_t)(nxt_thread_t *thr,
+    nxt_chan_recv_msg_t *msg);
+
+
+void nxt_process_chan_create(nxt_thread_t *thr, nxt_process_chan_t *proc,
+    nxt_process_chan_handler_t *handlers);
+void nxt_process_chan_write(nxt_cycle_t *cycle, nxt_uint_t type,
+    nxt_fd_t fd, uint32_t stream, nxt_buf_t *b);
+void nxt_process_new_chan(nxt_cycle_t *cycle, nxt_process_chan_t *proc);
+void nxt_process_chan_change_log_file(nxt_cycle_t *cycle, nxt_uint_t slot,
+    nxt_fd_t fd);
+
+void nxt_process_chan_quit_handler(nxt_thread_t *thr, nxt_chan_recv_msg_t *msg);
+void nxt_process_chan_new_handler(nxt_thread_t *thr, nxt_chan_recv_msg_t *msg);
+void nxt_process_chan_change_log_file_handler(nxt_thread_t *thr,
+    nxt_chan_recv_msg_t *msg);
+void nxt_process_chan_data_handler(nxt_thread_t *thr, nxt_chan_recv_msg_t *msg);
+void nxt_process_chan_empty_handler(nxt_thread_t *thr,
+    nxt_chan_recv_msg_t *msg);
+
+
+#endif /* _NXT_PROCESS_CHAN_H_INCLUDED_ */