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authoroharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>2008-07-24 10:16:44 +0000
committeroharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>2008-07-24 10:16:44 +0000
commit91a16a38101821ed8813de753a0624f892cd669c (patch)
treec6695a3ca85f76cd67f109f08c759aa9ccc33db7 /src
parent06d501a192e36986ba0f81c7ddff9298dd0a389e (diff)
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Better handling of OpenOCD command invocation result/context.
git-svn-id: svn://svn.berlios.de/openocd/trunk@866 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'src')
-rw-r--r--src/helper/command.c78
-rw-r--r--src/openocd.c4
2 files changed, 54 insertions, 28 deletions
diff --git a/src/helper/command.c b/src/helper/command.c
index 81eadd3f..ada745f2 100644
--- a/src/helper/command.c
+++ b/src/helper/command.c
@@ -55,12 +55,15 @@ static void tcl_output(void *privData, const char *file, int line, const char *f
Jim_AppendString(interp, tclOutput, string, strlen(string));
}
+extern command_context_t *global_cmd_ctx;
+
+
static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
/* the private data is stashed in the interp structure */
command_t *c;
command_context_t *context;
- int *retval;
+ int retval;
int i;
int nwords;
char **words;
@@ -92,26 +95,40 @@ static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
/* grab the command context from the associated data */
context = Jim_GetAssocData(interp, "context");
- retval = Jim_GetAssocData(interp, "retval");
- if (context != NULL && retval != NULL)
+ if (context == NULL)
{
- /* capture log output and return it */
- Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
- log_add_callback(tcl_output, tclOutput);
-
- *retval = run_command(context, c, words, nwords);
-
- log_remove_callback(tcl_output, tclOutput);
-
- /* We dump output into this local variable */
- Jim_SetVariableStr(interp, "ocd_output", tclOutput);
+ /* Tcl can invoke commands directly instead of via command_run_line(). This would
+ * happen when the Jim Tcl interpreter is provided by eCos.
+ */
+ context = global_cmd_ctx;
}
+
+ /* capture log output and return it */
+ Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
+ /* a garbage collect can happen, so we need a reference count to this object */
+ Jim_IncrRefCount(tclOutput);
+
+ log_add_callback(tcl_output, tclOutput);
+
+ retval = run_command(context, c, words, nwords);
+
+ log_remove_callback(tcl_output, tclOutput);
+
+ /* We dump output into this local variable */
+ Jim_SetVariableStr(interp, "ocd_output", tclOutput);
+ Jim_DecrRefCount(interp, tclOutput);
for (i = 0; i < nwords; i++)
free(words[i]);
free(words);
- return (*retval==ERROR_OK)?JIM_OK:JIM_ERR;
+ int *return_retval = Jim_GetAssocData(interp, "retval");
+ if (return_retval != NULL)
+ {
+ *return_retval = retval;
+ }
+
+ return (retval==ERROR_OK)?JIM_OK:JIM_ERR;
}
command_t* register_command(command_context_t *context, command_t *parent, char *name, int (*handler)(struct command_context_s *context, char* name, char** args, int argc), enum command_mode mode, char *help)
@@ -393,21 +410,28 @@ int command_run_line(command_context_t *context, char *line)
* results
*/
/* run the line thru a script engine */
- int retval;
+ int retval=ERROR_FAIL;
int retcode;
- Jim_DeleteAssocData(interp, "context"); /* remove existing */
+ /* Beware! This code needs to be reentrant. It is also possible
+ * for OpenOCD commands to be invoked directly from Tcl. This would
+ * happen when the Jim Tcl interpreter is provided by eCos for
+ * instance.
+ */
+ Jim_DeleteAssocData(interp, "context");
retcode = Jim_SetAssocData(interp, "context", NULL, context);
- if (retcode != JIM_OK)
- return ERROR_FAIL;
-
- /* associated the return value */
- retval = ERROR_OK;
- Jim_DeleteAssocData(interp, "retval"); /* remove existing */
- retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
- if (retcode != JIM_OK)
- return ERROR_FAIL;
-
- retcode = Jim_Eval(interp, line);
+ if (retcode == JIM_OK)
+ {
+ /* associated the return value */
+ Jim_DeleteAssocData(interp, "retval");
+ retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
+ if (retcode == JIM_OK)
+ {
+ retcode = Jim_Eval(interp, line);
+
+ Jim_DeleteAssocData(interp, "retval");
+ }
+ Jim_DeleteAssocData(interp, "context");
+ }
if (retcode == JIM_ERR) {
if (retval!=ERROR_COMMAND_CLOSE_CONNECTION)
{
diff --git a/src/openocd.c b/src/openocd.c
index 6babbb84..c694b6a8 100644
--- a/src/openocd.c
+++ b/src/openocd.c
@@ -131,11 +131,13 @@ int handle_init_command(struct command_context_s *cmd_ctx, char *cmd, char **arg
return ERROR_OK;
}
+command_context_t *global_cmd_ctx;
+
command_context_t *setup_command_handler(void)
{
command_context_t *cmd_ctx;
- cmd_ctx = command_init();
+ global_cmd_ctx = cmd_ctx = command_init();
register_command(cmd_ctx, NULL, "version", handle_version_command,
COMMAND_EXEC, "show OpenOCD version");