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Add a command queue to standardize and simplify commands that call other

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commands and allow a command to block execution of subsequent commands. This
allows run-shell and if-shell to be synchronous which has been much requested.

Each client has a default command queue and commands are consumed one at a time
from it. A command may suspend execution from the queue by returning
CMD_RETURN_WAIT and then resume it by calling cmd_continue() - for example
run-shell does this from the callback that is fired after the job is freed.

When the command queue becomes empty, command clients are automatically exited
(unless attaching). A callback is also fired - this is used for nested commands
in, for example, if-shell which can block execution of the client's cmdq until
a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the old
curclient/cmdclient distinction - a cmdq is bound to one client (or none if in
the configuration file), this is a command client if c->session is NULL
otherwise an attached client.
This commit is contained in:
Nicholas Marriott
2013-02-23 22:25:58 +00:00
parent 357da035b9
commit 3964309c67
86 changed files with 1218 additions and 1219 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
cmd-list.c
View File

@@ -24,7 +24,8 @@
#include "tmux.h"
struct cmd_list *
cmd_list_parse(int argc, char **argv, char **cause)
cmd_list_parse(int argc, char **argv, const char* file, u_int line,
char **cause)
{
struct cmd_list *cmdlist;
struct cmd *cmd;
@@ -34,7 +35,7 @@ cmd_list_parse(int argc, char **argv, char **cause)
copy_argv = cmd_copy_argv(argc, argv);
cmdlist = xmalloc(sizeof *cmdlist);
cmdlist = xcalloc(1, sizeof *cmdlist);
cmdlist->references = 1;
TAILQ_INIT(&cmdlist->list);
@@ -55,7 +56,7 @@ cmd_list_parse(int argc, char **argv, char **cause)
if (arglen != 1)
new_argc++;
cmd = cmd_parse(new_argc, new_argv, cause);
cmd = cmd_parse(new_argc, new_argv, file, line, cause);
if (cmd == NULL)
goto bad;
TAILQ_INSERT_TAIL(&cmdlist->list, cmd, qentry);
@@ -64,7 +65,8 @@ cmd_list_parse(int argc, char **argv, char **cause)
}
if (lastsplit != argc) {
cmd = cmd_parse(argc - lastsplit, copy_argv + lastsplit, cause);
cmd = cmd_parse(argc - lastsplit, copy_argv + lastsplit,
file, line, cause);
if (cmd == NULL)
goto bad;
TAILQ_INSERT_TAIL(&cmdlist->list, cmd, qentry);
@@ -79,76 +81,21 @@ bad:
return (NULL);
}
enum cmd_retval
cmd_list_exec(struct cmd_list *cmdlist, struct cmd_ctx *ctx)
{
struct client *c = ctx->curclient;
struct cmd *cmd;
enum cmd_retval retval;
int guards, n;
guards = 0;
if (c != NULL && c->session != NULL)
guards = c->flags & CLIENT_CONTROL;
notify_disable();
retval = 0;
TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
if (guards)
ctx->print(ctx, "%%begin");
n = cmd->entry->exec(cmd, ctx);
if (guards)
ctx->print(ctx, "%%end");
switch (n)
{
case CMD_RETURN_ERROR:
return (CMD_RETURN_ERROR);
case CMD_RETURN_ATTACH:
/* Client is being attached (send MSG_READY). */
retval = CMD_RETURN_ATTACH;
/*
* Mangle the context to treat any following commands
* as if they were called from inside.
*/
if (ctx->curclient == NULL) {
ctx->curclient = ctx->cmdclient;
ctx->cmdclient = NULL;
ctx->error = key_bindings_error;
ctx->print = key_bindings_print;
ctx->info = key_bindings_info;
}
break;
case CMD_RETURN_YIELD:
if (retval == CMD_RETURN_NORMAL)
retval = CMD_RETURN_YIELD;
break;
case CMD_RETURN_NORMAL:
break;
}
}
notify_enable();
return (retval);
}
void
cmd_list_free(struct cmd_list *cmdlist)
{
struct cmd *cmd;
struct cmd *cmd, *cmd1;
if (--cmdlist->references != 0)
return;
while (!TAILQ_EMPTY(&cmdlist->list)) {
cmd = TAILQ_FIRST(&cmdlist->list);
TAILQ_FOREACH_SAFE(cmd, &cmdlist->list, qentry, cmd1) {
TAILQ_REMOVE(&cmdlist->list, cmd, qentry);
args_free(cmd->args);
free(cmd->file);
free(cmd);
}
free(cmdlist);
}