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patch 7.4.1787

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Problem:    When a job ends the close callback is invoked before other
            callbacks. On Windows the close callback is not called.
Solution:   First invoke out/err callbacks before the close callback.
            Make the close callback work on Windows.
This commit is contained in:
Bram Moolenaar
2016-04-26 17:16:24 +02:00
parent d10abe5201
commit b2658a1ab0
5 changed files with 120 additions and 50 deletions
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133
src/channel.c
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@@ -54,6 +54,8 @@
# define fd_close(sd) close(sd)
#endif
static void channel_read(channel_T *channel, int part, char *func);
/* Whether a redraw is needed for appending a line to a buffer. */
static int channel_need_redraw = FALSE;
@@ -2427,18 +2429,28 @@ channel_close(channel_T *channel, int invoke_close_cb)
typval_T argv[1];
typval_T rettv;
int dummy;
int part;
/* invoke the close callback; increment the refcount to avoid it
* being freed halfway */
ch_logs(channel, "Invoking close callback %s",
(char *)channel->ch_close_cb);
argv[0].v_type = VAR_CHANNEL;
argv[0].vval.v_channel = channel;
/* Invoke callbacks before the close callback, since it's weird to
* first invoke the close callback. Increment the refcount to avoid
* the channel being freed halfway. */
++channel->ch_refcount;
call_func(channel->ch_close_cb, (int)STRLEN(channel->ch_close_cb),
for (part = PART_SOCK; part <= PART_ERR; ++part)
while (may_invoke_callback(channel, part))
;
/* Invoke the close callback, if still set. */
if (channel->ch_close_cb != NULL)
{
ch_logs(channel, "Invoking close callback %s",
(char *)channel->ch_close_cb);
argv[0].v_type = VAR_CHANNEL;
argv[0].vval.v_channel = channel;
call_func(channel->ch_close_cb, (int)STRLEN(channel->ch_close_cb),
&rettv, 1, argv, 0L, 0L, &dummy, TRUE,
channel->ch_close_partial, NULL);
clear_tv(&rettv);
clear_tv(&rettv);
}
--channel->ch_refcount;
/* the callback is only called once */
@@ -2592,11 +2604,19 @@ channel_fill_poll_write(int nfd_in, struct pollfd *fds)
}
#endif
typedef enum {
CW_READY,
CW_NOT_READY,
CW_ERROR
} channel_wait_result;
/*
* Check for reading from "fd" with "timeout" msec.
* Return FAIL when there is nothing to read.
* Return CW_READY when there is something to read.
* Return CW_NOT_READY when there is nothing to read.
* Return CW_ERROR when there is an error.
*/
static int
static channel_wait_result
channel_wait(channel_T *channel, sock_T fd, int timeout)
{
if (timeout > 0)
@@ -2613,9 +2633,12 @@ channel_wait(channel_T *channel, sock_T fd, int timeout)
/* reading from a pipe, not a socket */
while (TRUE)
{
if (PeekNamedPipe((HANDLE)fd, NULL, 0, NULL, &nread, NULL)
&& nread > 0)
return OK;
int r = PeekNamedPipe((HANDLE)fd, NULL, 0, NULL, &nread, NULL);
if (r && nread > 0)
return CW_READY;
if (r == 0)
return CW_ERROR;
/* perhaps write some buffer lines */
channel_write_any_lines();
@@ -2665,7 +2688,7 @@ channel_wait(channel_T *channel, sock_T fd, int timeout)
if (ret > 0)
{
if (FD_ISSET(fd, &rfds))
return OK;
return CW_READY;
channel_write_any_lines();
continue;
}
@@ -2683,7 +2706,7 @@ channel_wait(channel_T *channel, sock_T fd, int timeout)
if (poll(fds, nfd, timeout) > 0)
{
if (fds[0].revents & POLLIN)
return OK;
return CW_READY;
channel_write_any_lines();
continue;
}
@@ -2691,7 +2714,36 @@ channel_wait(channel_T *channel, sock_T fd, int timeout)
}
#endif
}
return FAIL;
return CW_NOT_READY;
}
static void
channel_close_on_error(channel_T *channel, int part, char *func)
{
/* Do not call emsg(), most likely the other end just exited. */
ch_errors(channel, "%s(): Cannot read from channel", func);
/* Queue a "DETACH" netbeans message in the command queue in order to
* terminate the netbeans session later. Do not end the session here
* directly as we may be running in the context of a call to
* netbeans_parse_messages():
* netbeans_parse_messages
* -> autocmd triggered while processing the netbeans cmd
* -> ui_breakcheck
* -> gui event loop or select loop
* -> channel_read()
* Don't send "DETACH" for a JS or JSON channel.
*/
if (channel->ch_part[part].ch_mode == MODE_RAW
|| channel->ch_part[part].ch_mode == MODE_NL)
channel_save(channel, part, (char_u *)DETACH_MSG_RAW,
(int)STRLEN(DETACH_MSG_RAW), FALSE, "PUT ");
/* When reading from stdout is not possible, assume the other side has
* died. */
channel_close(channel, TRUE);
if (channel->ch_nb_close_cb != NULL)
(*channel->ch_nb_close_cb)();
}
/*
@@ -2699,7 +2751,7 @@ channel_wait(channel_T *channel, sock_T fd, int timeout)
* "part" is PART_SOCK, PART_OUT or PART_ERR.
* The data is put in the read queue.
*/
void
static void
channel_read(channel_T *channel, int part, char *func)
{
static char_u *buf = NULL;
@@ -2729,7 +2781,7 @@ channel_read(channel_T *channel, int part, char *func)
* MAXMSGSIZE long. */
for (;;)
{
if (channel_wait(channel, fd, 0) == FAIL)
if (channel_wait(channel, fd, 0) != CW_READY)
break;
if (use_socket)
len = sock_read(fd, (char *)buf, MAXMSGSIZE);
@@ -2747,33 +2799,7 @@ channel_read(channel_T *channel, int part, char *func)
/* Reading a disconnection (readlen == 0), or an error. */
if (readlen <= 0)
{
/* Do not give an error message, most likely the other end just
* exited. */
ch_errors(channel, "%s(): Cannot read from channel", func);
/* Queue a "DETACH" netbeans message in the command queue in order to
* terminate the netbeans session later. Do not end the session here
* directly as we may be running in the context of a call to
* netbeans_parse_messages():
* netbeans_parse_messages
* -> autocmd triggered while processing the netbeans cmd
* -> ui_breakcheck
* -> gui event loop or select loop
* -> channel_read()
* Don't send "DETACH" for a JS or JSON channel.
*/
if (channel->ch_part[part].ch_mode == MODE_RAW
|| channel->ch_part[part].ch_mode == MODE_NL)
channel_save(channel, part, (char_u *)DETACH_MSG_RAW,
(int)STRLEN(DETACH_MSG_RAW), FALSE, "PUT ");
/* When reading from stdout is not possible, assume the other side has
* died. */
channel_close(channel, TRUE);
if (channel->ch_nb_close_cb != NULL)
(*channel->ch_nb_close_cb)();
}
channel_close_on_error(channel, part, func);
#if defined(CH_HAS_GUI) && defined(FEAT_GUI_GTK)
/* signal the main loop that there is something to read */
@@ -2812,7 +2838,7 @@ channel_read_block(channel_T *channel, int part, int timeout)
/* Wait for up to the channel timeout. */
if (fd == INVALID_FD)
return NULL;
if (channel_wait(channel, fd, timeout) == FAIL)
if (channel_wait(channel, fd, timeout) != CW_READY)
{
ch_log(channel, "Timed out");
return NULL;
@@ -2916,7 +2942,8 @@ channel_read_json_block(
timeout = timeout_arg;
}
fd = chanpart->ch_fd;
if (fd == INVALID_FD || channel_wait(channel, fd, timeout) == FAIL)
if (fd == INVALID_FD
|| channel_wait(channel, fd, timeout) != CW_READY)
{
if (timeout == timeout_arg)
{
@@ -3037,8 +3064,16 @@ channel_handle_events(void)
for (part = PART_SOCK; part <= PART_ERR; ++part)
{
fd = channel->ch_part[part].ch_fd;
if (fd != INVALID_FD && channel_wait(channel, fd, 0) == OK)
channel_read(channel, part, "channel_handle_events");
if (fd != INVALID_FD)
{
int r = channel_wait(channel, fd, 0);
if (r == CW_READY)
channel_read(channel, part, "channel_handle_events");
else if (r == CW_ERROR)
channel_close_on_error(channel, part,
"channel_handle_events()");
}
}
}
}