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-rw-r--r--HISTORY11
-rw-r--r--config.h10
-rw-r--r--menu.c11
-rw-r--r--player.c12
-rw-r--r--player.h13
-rw-r--r--skinlcars.c5
-rw-r--r--vdr.c69
7 files changed, 92 insertions, 39 deletions
diff --git a/HISTORY b/HISTORY
index 78a8bdab..edd56ac5 100644
--- a/HISTORY
+++ b/HISTORY
@@ -9420,7 +9420,7 @@ Video Disk Recorder Revision History
- Fixed handling the S2SatelliteDeliverySystemDescriptor for transponders broadcasting
in "backwards compatibility mode" according to ETSI EN 300 468 (thanks to Onur Sentürk).
-2020-05-15:
+2020-05-18: Version 2.4.2
- Fixed moving channels between number groups in SVDRP's MOVC command and the Channels
menu, in case a channel is moved to a higher number and into a numbered group
@@ -9443,3 +9443,12 @@ Video Disk Recorder Revision History
is valid (suggested by Helmut Binder).
- The isSingleByte parameter in the call to getCharacterTable() is deprecated and only
present for backwards compatibility.
+- Fixed a possible crash in case replay is started and stopped in rapid sequence, by
+ adding missing locking to cControl::Control(). The caller of this function must now
+ provide a cMutexLock which stays alive as long as the result of this call is used.
+ The old version of this function is still there for backwards compatibility with
+ plugins, because this problem appears to occur only under very rare circumstances.
+ Authors of plugins that use this function should switch to the new version, because
+ the old one is deprecated and will be removed in a future version.
+ The version numbers (both VDRVERSNUM and APIVERSNUM) have been bumped to 2.4.2, so
+ that plugins can detect the presence of the new cControl::Control().
diff --git a/config.h b/config.h
index 4f37e072..72be5231 100644
--- a/config.h
+++ b/config.h
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: config.h 4.16 2019/06/16 09:13:45 kls Exp $
+ * $Id: config.h 4.17 2020/05/18 16:47:29 kls Exp $
*/
#ifndef __CONFIG_H
@@ -22,13 +22,13 @@
// VDR's own version number:
-#define VDRVERSION "2.4.1"
-#define VDRVERSNUM 20401 // Version * 10000 + Major * 100 + Minor
+#define VDRVERSION "2.4.2"
+#define VDRVERSNUM 20402 // Version * 10000 + Major * 100 + Minor
// The plugin API's version number:
-#define APIVERSION "2.4.1"
-#define APIVERSNUM 20401 // Version * 10000 + Major * 100 + Minor
+#define APIVERSION "2.4.2"
+#define APIVERSNUM 20402 // Version * 10000 + Major * 100 + Minor
// When loading plugins, VDR searches them by their APIVERSION, which
// may be smaller than VDRVERSION in case there have been no changes to
diff --git a/menu.c b/menu.c
index 58c7763e..baa93173 100644
--- a/menu.c
+++ b/menu.c
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: menu.c 4.81 2020/04/11 09:22:05 kls Exp $
+ * $Id: menu.c 4.82 2020/05/18 16:47:29 kls Exp $
*/
#include "menu.h"
@@ -2731,7 +2731,8 @@ eOSState cMenuRecordingEdit::DeleteMarks(void)
if (buttonDeleteMarks && Interface->Confirm(tr("Delete editing marks for this recording?"))) {
if (cMarks::DeleteMarksFile(recording)) {
SetHelpKeys();
- if (cControl *Control = cControl::Control(true)) {
+ cMutexLock ControlMutexLock;
+ if (cControl *Control = cControl::Control(ControlMutexLock, true)) {
if (const cRecording *Recording = Control->GetRecording()) {
if (strcmp(recording->FileName(), Recording->FileName()) == 0)
Control->ClearEditingMarks();
@@ -4457,7 +4458,11 @@ bool cMenuMain::Update(bool Force)
{
bool result = false;
- bool NewReplaying = cControl::Control() != NULL;
+ bool NewReplaying = false;
+ {
+ cMutexLock ControlMutexLock;
+ NewReplaying = cControl::Control(ControlMutexLock) != NULL;
+ }
if (Force || NewReplaying != replaying) {
replaying = NewReplaying;
// Replay control:
diff --git a/player.c b/player.c
index 5c95f4e4..ff54f495 100644
--- a/player.c
+++ b/player.c
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: player.c 2.2 2012/04/28 11:52:50 kls Exp $
+ * $Id: player.c 4.1 2020/05/18 16:47:29 kls Exp $
*/
#include "player.h"
@@ -70,16 +70,24 @@ cString cControl::GetHeader(void)
return "";
}
+#if DEPRECATED_CCONTROL
cControl *cControl::Control(bool Hidden)
{
cMutexLock MutexLock(&mutex);
return (control && (!control->hidden || Hidden)) ? control : NULL;
}
+#endif
+
+cControl *cControl::Control(cMutexLock &MutexLock, bool Hidden)
+{
+ MutexLock.Lock(&mutex);
+ return (control && (!control->hidden || Hidden)) ? control : NULL;
+}
void cControl::Launch(cControl *Control)
{
cMutexLock MutexLock(&mutex);
- cControl *c = control; // keeps control from pointing to uninitialized memory
+ cControl *c = control; // keeps control from pointing to uninitialized memory TODO obsolete once DEPRECATED_CCONTROL is gone
control = Control;
delete c;
}
diff --git a/player.h b/player.h
index d67bf2a9..22c748bd 100644
--- a/player.h
+++ b/player.h
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: player.h 4.4 2018/02/01 15:34:51 kls Exp $
+ * $Id: player.h 4.5 2020/05/18 16:47:29 kls Exp $
*/
#ifndef __PLAYER_H
@@ -114,10 +114,21 @@ public:
static void Launch(cControl *Control);
static void Attach(void);
static void Shutdown(void);
+#define DEPRECATED_CCONTROL 1
+#if DEPRECATED_CCONTROL
static cControl *Control(bool Hidden = false);
+ ///< Old version of this function, for backwards compatibility with plugins.
+ ///< Plugins should be changed to use the new version below, which does
+ ///< proper locking.
+ ///< Use of this function may result in program crashes in case replay is
+ ///< stopped immediately after starting it.
+#endif
+ static cControl *Control(cMutexLock &MutexLock, bool Hidden = false);
///< Returns the current replay control (if any) in case it is currently
///< visible. If Hidden is true, the control will be returned even if it is
///< currently hidden.
+ ///< The given MutexLock must live as long as the replay control is accessed,
+ ///< and must go out of scope as soon as the control is no longer accessed.
};
#endif //__PLAYER_H
diff --git a/skinlcars.c b/skinlcars.c
index aedca5dc..0f431631 100644
--- a/skinlcars.c
+++ b/skinlcars.c
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: skinlcars.c 4.6 2017/11/08 10:10:30 kls Exp $
+ * $Id: skinlcars.c 4.7 2020/05/18 16:47:29 kls Exp $
*/
// "Star Trek: The Next Generation"(R) is a registered trademark of Paramount Pictures,
@@ -1741,12 +1741,13 @@ void cSkinLCARSDisplayMenu::Flush(void)
{
if (MenuCategory() == mcMain) {
cDevice *Device = cDevice::PrimaryDevice();
+ cMutexLock ControlMutexLock;
if (!Device->Replaying() || Device->Transferring()) {
LOCK_CHANNELS_READ;
const cChannel *Channel = Channels->GetByNumber(cDevice::PrimaryDevice()->CurrentChannel());
DrawLive(Channel);
}
- else if (cControl *Control = cControl::Control(true))
+ else if (cControl *Control = cControl::Control(ControlMutexLock, true))
DrawPlay(Control);
DrawTimers();
DrawDevices();
diff --git a/vdr.c b/vdr.c
index 77f65673..2ff5cfb4 100644
--- a/vdr.c
+++ b/vdr.c
@@ -22,7 +22,7 @@
*
* The project's page is at http://www.tvdr.de
*
- * $Id: vdr.c 4.32 2020/05/15 11:31:40 kls Exp $
+ * $Id: vdr.c 4.33 2020/05/18 16:47:29 kls Exp $
*/
#include <getopt.h>
@@ -1196,8 +1196,19 @@ int main(int argc, char *argv[])
// Queued messages:
Skins.ProcessQueuedMessages();
// User Input:
- cOsdObject *Interact = Menu ? Menu : cControl::Control();
- eKeys key = Interface->GetKey(!Interact || !Interact->NeedsFastResponse());
+ bool NeedsFastResponse = Menu && Menu->NeedsFastResponse();
+ if (!NeedsFastResponse) {
+ // Must limit the scope of ControlMutexLock here to not hold the lock during the call to Interface->GetKey().
+ cMutexLock ControlMutexLock;
+ cControl *Control = cControl::Control(ControlMutexLock);
+ NeedsFastResponse = Control && Control->NeedsFastResponse();
+ }
+ eKeys key = Interface->GetKey(!NeedsFastResponse);
+ cOsdObject *Interact = Menu;
+ cMutexLock ControlMutexLock;
+ cControl *Control = NULL;
+ if (!Menu)
+ Interact = Control = cControl::Control(ControlMutexLock);
if (ISREALKEY(key)) {
EITScanner.Activity();
// Cancel shutdown countdown:
@@ -1215,9 +1226,9 @@ int main(int argc, char *argv[])
bool WasMenu = Interact && Interact->IsMenu();
if (Menu)
DELETE_MENU;
- else if (cControl::Control()) {
+ else if (Control) {
if (cOsd::IsOpen())
- cControl::Control()->Hide();
+ Control->Hide();
else
WasOpen = false;
}
@@ -1233,9 +1244,9 @@ int main(int argc, char *argv[])
}
else if (!Menu) {
IsInfoMenu = true;
- if (cControl::Control()) {
- cControl::Control()->Hide();
- Menu = cControl::Control()->GetInfo();
+ if (Control) {
+ Control->Hide();
+ Menu = Control->GetInfo();
if (Menu)
Menu->Show();
else
@@ -1252,8 +1263,8 @@ int main(int argc, char *argv[])
// Direct main menu functions:
#define DirectMainFunction(function)\
{ DELETE_MENU;\
- if (cControl::Control())\
- cControl::Control()->Hide();\
+ if (Control)\
+ Control->Hide();\
Menu = new cMenuMain(function);\
key = kNone; } // nobody else needs to see this key
case kSchedule: DirectMainFunction(osSchedule); break;
@@ -1267,8 +1278,8 @@ int main(int argc, char *argv[])
const char *PluginName = cRemote::GetPlugin();
if (PluginName) {
DELETE_MENU;
- if (cControl::Control())
- cControl::Control()->Hide();
+ if (Control)
+ Control->Hide();
cPlugin *plugin = cPluginManager::GetPlugin(PluginName);
if (plugin) {
Menu = plugin->MainMenuAction();
@@ -1290,7 +1301,7 @@ int main(int argc, char *argv[])
Menu = new cDisplayChannel(NORMALKEY(key));
continue;
}
- else if (cDisplayChannel::IsOpen() || cControl::Control()) {
+ else if (cDisplayChannel::IsOpen() || Control) {
Interact->ProcessKey(key);
continue;
}
@@ -1318,8 +1329,8 @@ int main(int argc, char *argv[])
break;
// Audio track control:
case kAudio:
- if (cControl::Control())
- cControl::Control()->Hide();
+ if (Control)
+ Control->Hide();
if (!cDisplayTracks::IsOpen()) {
DELETE_MENU;
Menu = cDisplayTracks::Create();
@@ -1330,8 +1341,8 @@ int main(int argc, char *argv[])
break;
// Subtitle track control:
case kSubtitles:
- if (cControl::Control())
- cControl::Control()->Hide();
+ if (Control)
+ Control->Hide();
if (!cDisplaySubtitleTracks::IsOpen()) {
DELETE_MENU;
Menu = cDisplaySubtitleTracks::Create();
@@ -1343,7 +1354,7 @@ int main(int argc, char *argv[])
// Pausing live video:
case kPlayPause:
case kPause:
- if (!cControl::Control()) {
+ if (!Control) {
DELETE_MENU;
if (Setup.PauseKeyHandling) {
if (Setup.PauseKeyHandling > 1 || Interface->Confirm(tr("Pause live video?"))) {
@@ -1356,7 +1367,7 @@ int main(int argc, char *argv[])
break;
// Instant recording:
case kRecord:
- if (!cControl::Control()) {
+ if (!Control) {
if (Setup.RecordKeyHandling) {
if (Setup.RecordKeyHandling > 1 || Interface->Confirm(tr("Start recording?"))) {
if (cRecordControls::Start())
@@ -1395,15 +1406,16 @@ int main(int argc, char *argv[])
break;
default: break;
}
- Interact = Menu ? Menu : cControl::Control(); // might have been closed in the mean time
+ Interact = Menu ? Menu : Control; // might have been closed in the mean time
if (Interact) {
LastInteract = Now;
eOSState state = Interact->ProcessKey(key);
- if (state == osUnknown && Interact != cControl::Control()) {
- if (ISMODELESSKEY(key) && cControl::Control()) {
- state = cControl::Control()->ProcessKey(key);
+ if (state == osUnknown && Interact != Control) {
+ if (ISMODELESSKEY(key) && Control) {
+ state = Control->ProcessKey(key);
if (state == osEnd) {
// let's not close a menu when replay ends:
+ Control = NULL;
cControl::Shutdown();
continue;
}
@@ -1422,15 +1434,18 @@ int main(int argc, char *argv[])
break;
case osRecordings:
DELETE_MENU;
+ Control = NULL;
cControl::Shutdown();
Menu = new cMenuMain(osRecordings, true);
break;
case osReplay: DELETE_MENU;
+ Control = NULL;
cControl::Shutdown();
cControl::Launch(new cReplayControl);
break;
case osStopReplay:
DELETE_MENU;
+ Control = NULL;
cControl::Shutdown();
break;
case osPlugin: DELETE_MENU;
@@ -1441,8 +1456,10 @@ int main(int argc, char *argv[])
case osBack:
case osEnd: if (Interact == Menu)
DELETE_MENU;
- else
+ else {
+ Control = NULL;
cControl::Shutdown();
+ }
break;
default: ;
}
@@ -1487,6 +1504,7 @@ int main(int argc, char *argv[])
// Instant resume of the last viewed recording:
case kPlay:
if (cReplayControl::LastReplayed()) {
+ Control = NULL;
cControl::Shutdown();
cControl::Launch(new cReplayControl);
}
@@ -1512,6 +1530,7 @@ int main(int argc, char *argv[])
int NewPrimaryDVB = Setup.PrimaryDVB;
if (NewPrimaryDVB != OldPrimaryDVB) {
DELETE_MENU;
+ Control = NULL;
cControl::Shutdown();
Skins.QueueMessage(mtInfo, tr("Switching primary DVB..."));
cOsdProvider::Shutdown();
@@ -1532,7 +1551,7 @@ int main(int argc, char *argv[])
ShutdownHandler.countdown.Cancel();
}
- if (!cControl::Control() && !cRecordControls::Active() && !RecordingsHandler.Active() && (Now - cRemote::LastActivity()) > ACTIVITYTIMEOUT) {
+ if (!Control && !cRecordControls::Active() && !RecordingsHandler.Active() && (Now - cRemote::LastActivity()) > ACTIVITYTIMEOUT) {
// Shutdown:
// Check whether VDR will be ready for shutdown in SHUTDOWNWAIT seconds:
time_t Soon = Now + SHUTDOWNWAIT;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-25 14:04:35 +0000