lib-master: ipc-client: Use linked list of commads instead of array

Needed for the following commit that returns the command pointer.

diff --git a/src/lib-master/ipc-client.c b/src/lib-master/ipc-client.c
index cbb9eb6327b76857b9a0c5d96acf0bef8b5e467e..3540130ef4029466f5220b7c1bad8bc847adfe9e 100644 (file)
--- a/src/lib-master/ipc-client.c
+++ b/src/lib-master/ipc-client.c
@@ -1,9 +1,9 @@
 /* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
 
 #include "lib.h"
-#include "array.h"
 #include "ioloop.h"
 #include "net.h"
+#include "llist.h"
 #include "istream.h"
 #include "ostream.h"
 #include "hostpid.h"
@@ -13,6 +13,8 @@
 #include <unistd.h>
 
 struct ipc_client_cmd {
+       struct ipc_client_cmd *prev, *next;
+
        ipc_client_callback_t *callback;
        void *context;
 };
@@ -26,20 +28,18 @@ struct ipc_client {
        struct timeout *to;
        struct istream *input;
        struct ostream *output;
-       ARRAY(struct ipc_client_cmd) cmds;
+       struct ipc_client_cmd *cmds_head, *cmds_tail;
 };
 
 static void ipc_client_disconnect(struct ipc_client *client);
 
 static void ipc_client_input_line(struct ipc_client *client, const char *line)
 {
-       const struct ipc_client_cmd *cmds;
-       unsigned int count;
+       struct ipc_client_cmd *cmd = client->cmds_head;
        enum ipc_client_cmd_state state;
        bool disconnect = FALSE;
 
-       cmds = array_get(&client->cmds, &count);
-       if (count == 0) {
+       if (cmd == NULL) {
                i_error("IPC proxy sent unexpected input: %s", line);
                return;
        }
@@ -62,9 +62,10 @@ static void ipc_client_input_line(struct ipc_client *client, const char *line)
                break;
        }
 
-       cmds[0].callback(state, line, cmds[0].context);
        if (state != IPC_CLIENT_CMD_STATE_REPLY)
-               array_delete(&client->cmds, 0, 1);
+               DLLIST2_REMOVE(&client->cmds_head, &client->cmds_tail, cmd);
+       cmd->callback(state, line, cmd->context);
+       i_free(cmd);
        if (disconnect)
                ipc_client_disconnect(client);
 }
@@ -102,16 +103,19 @@ static int ipc_client_connect(struct ipc_client *client)
 
 static void ipc_client_disconnect(struct ipc_client *client)
 {
-       const struct ipc_client_cmd *cmd;
+       struct ipc_client_cmd *cmd, *next;
 
        if (client->fd == -1)
                return;
 
-       array_foreach(&client->cmds, cmd) {
+       cmd = client->cmds_head;
+       client->cmds_head = client->cmds_tail = NULL;
+       for (; cmd != NULL; cmd = next) {
                cmd->callback(IPC_CLIENT_CMD_STATE_ERROR,
                              "Disconnected", cmd->context);
+               next = cmd->next;
+               i_free(cmd);
        }
-       array_clear(&client->cmds);
 
        io_remove(&client->io);
        i_stream_destroy(&client->input);
@@ -129,7 +133,6 @@ ipc_client_init(const char *ipc_socket_path)
        client = i_new(struct ipc_client, 1);
        client->path = i_strdup(ipc_socket_path);
        client->fd = -1;
-       i_array_init(&client->cmds, 8);
        return client;
 }
 
@@ -140,7 +143,6 @@ void ipc_client_deinit(struct ipc_client **_client)
        *_client = NULL;
 
        ipc_client_disconnect(client);
-       array_free(&client->cmds);
        i_free(client->path);
        i_free(client);
 }
@@ -163,7 +165,8 @@ void ipc_client_cmd(struct ipc_client *client, const char *cmd,
        iov[1].iov_len = 1;
        o_stream_nsendv(client->output, iov, N_ELEMENTS(iov));
 
-       ipc_cmd = array_append_space(&client->cmds);
+       ipc_cmd = i_new(struct ipc_client_cmd, 1);
        ipc_cmd->callback = callback;
        ipc_cmd->context = context;
+       DLLIST2_APPEND(&client->cmds_head, &client->cmds_tail, ipc_cmd);
 }