From 335fee3f36bd491197f8bd987baa6a7390f1750d Mon Sep 17 00:00:00 2001
From: zwelch <zwelch@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Sat, 30 May 2009 22:23:12 +0000
Subject: Encapsulate the global "jtag" jtag_interface pointer: - Add
 jtag_interface_quit, factored from exit_handler() in openocd.c. - Remove its
 extern declaration. - Add static keyword to its definition.

git-svn-id: svn://svn.berlios.de/openocd/trunk@1952 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/jtag/jtag.c | 16 +++++++++++++++-
 src/jtag/jtag.h |  5 +++--
 src/openocd.c   |  4 +---
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index ecd4931a..c9167f41 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -227,7 +227,7 @@ jtag_interface_t *jtag_interfaces[] = {
 	NULL,
 };
 
-jtag_interface_t *jtag = NULL;
+static jtag_interface_t *jtag = NULL;
 
 /* configuration */
 static jtag_interface_t *jtag_interface = NULL;
@@ -2407,6 +2407,20 @@ static int jtag_init_inner(struct command_context_s *cmd_ctx)
 	return ERROR_OK;
 }
 
+int jtag_interface_quit(void)
+{
+	if (!jtag || !jtag->quit)
+		return ERROR_OK;
+
+	// close the JTAG interface
+	int result = jtag->quit();
+	if (ERROR_OK != result)
+		LOG_ERROR("failed: %d", result);
+
+	return ERROR_OK;
+}
+
+
 int jtag_init_reset(struct command_context_s *cmd_ctx)
 {
 	int retval;
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index af4c64da..00a7bc83 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -512,8 +512,6 @@ typedef struct jtag_event_callback_s
 
 extern jtag_event_callback_t* jtag_event_callbacks;
 
-extern jtag_interface_t*      jtag; /* global pointer to configured JTAG interface */
-
 extern int jtag_speed;
 extern int jtag_speed_post_reset;
 
@@ -535,6 +533,9 @@ extern enum reset_types jtag_reset_config;
  */
 extern int  jtag_interface_init(struct command_context_s* cmd_ctx);
 
+/// Shutdown the JTAG interface upon program exit.
+extern int  jtag_interface_quit(void);
+
 /* initialize JTAG chain using only a RESET reset. If init fails,
  * try reset + init.
  */
diff --git a/src/openocd.c b/src/openocd.c
index 65664464..026a32b3 100644
--- a/src/openocd.c
+++ b/src/openocd.c
@@ -79,9 +79,7 @@ static int handle_version_command(struct command_context_s *cmd_ctx, char *cmd,
 
 static void exit_handler(void)
 {
-	/* close JTAG interface */
-	if (jtag && jtag->quit)
-		jtag->quit();
+	jtag_interface_quit();
 }
 
 static int log_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
-- 
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