Changed thread handling to make it work with NPTL

CONTRIBUTORS

@@ -177,6 +177,7 @@ Stefan Huelswitt <huels@iname.com>
  for fixing an uninitialized variable in cDisplayChannel
  for fixing a possible access of invalid file handles in cSIProcessor::Action()
  for fixing extracting the ES data in cDvbDevice::StillPicture()
+ for changing thread handling to make it work with NPTL ("Native Posix Thread Library")
 
 Ulrich R<>der <roeder@efr-net.de>
  for pointing out that there are channels that have a symbol rate higher than
@@ -210,6 +211,7 @@ Andreas Schultz <aschultz@warp10.net>
  for changing C++ style comments in libdtv into C style to avoid warnings in gcc 3.x
  for implementing the TerrestrialDeliverySystemDescriptor in libdtv
  for fixing setting the locking pid after a timed wait
+ for changing thread handling to make it work with NPTL ("Native Posix Thread Library")
 
 Aaron Holtzman
  for writing 'ac3dec'
@@ -243,6 +245,7 @@ Werner Fink <werner@suse.de>
  for replacing the 'for' loops in StripAudioPackets() with memset() calls
  for modifying handling of audio packets in cDvbPlayer for better sync with external
  AC3 replay
+ for changing thread handling to make it work with NPTL ("Native Posix Thread Library")
 
 Rolf Hakenes <hakenes@hippomi.de>
  for providing 'libdtv' and adapting the EIT mechanisms to it
@@ -758,6 +761,7 @@ Karim Afifi <karim.afifi@free.fr>
 
 Jon Burgess <mplayer@jburgess.uklinux.net>
  for pointing out a problem with NPTL ("Native Posix Thread Library")
+ for changing thread handling to make it work with NPTL ("Native Posix Thread Library")
 
 Thomas Schmidt <thomas.schmidt@in.stud.tu-ilmenau.de>
  for reporting a crash when cancelling a newly created timer

HISTORY

@@ -2433,3 +2433,8 @@ Video Disk Recorder Revision History
   full (suggested by Emil Naepflein).
 - Channel IDs are now checked when reading 'channels.conf' to avoid later
   problems with timers.
+
+2003-10-18: Version 1.3.0
+
+- Changed thread handling to make it work with NPTL ("Native Posix Thread Library").
+  Thanks to Jon Burgess, Andreas Schultz, Werner Fink and Stefan Huelswitt.

INSTALL

@@ -1,19 +1,9 @@
 Installation of the Video Disk Recorder
 ---------------------------------------
 
-Version 1.2
+Version 1.3
 -----------
 
-IMPORTANT NOTE:
----------------
-
-VDR currently doesn't work with NPTL ("Native Posix Thread Library").
-Either don't use NPTL, or set the environment variable
-
-  LD_ASSUME_KERNEL=2.4.1
-  
-before running VDR.
-
 Compiling and running the program:
 ----------------------------------
 

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 1.176 2003/10/17 12:35:23 kls Exp $
+ * $Id: config.h 1.177 2003/10/18 11:14:33 kls Exp $
  */
 
 #ifndef __CONFIG_H
@@ -19,8 +19,8 @@
 #include "device.h"
 #include "tools.h"
 
-#define VDRVERSION  "1.2.6pre1"
-#define VDRVERSNUM   10206  // Version * 10000 + Major * 100 + Minor
+#define VDRVERSION  "1.3.0"
+#define VDRVERSNUM   10300  // Version * 10000 + Major * 100 + Minor
 
 #define MAXPRIORITY 99
 #define MAXLIFETIME 99

ringbuffer.c

@@ -7,7 +7,7 @@
  * Parts of this file were inspired by the 'ringbuffy.c' from the
  * LinuxDVB driver (see linuxtv.org).
  *
- * $Id: ringbuffer.c 1.17 2003/05/12 17:38:11 kls Exp $
+ * $Id: ringbuffer.c 1.18 2003/10/18 10:29:25 kls Exp $
  */
 
 #include "ringbuffer.h"
@@ -75,7 +75,7 @@ cRingBufferLinear::cRingBufferLinear(int Size, int Margin, bool Statistics)
 {
   margin = Margin;
   buffer = NULL;
-  getThreadPid = -1;
+  getThreadTid = 0;
   if (Size > 1) { // 'Size - 1' must not be 0!
      buffer = MALLOC(uchar, Size);
      if (!buffer)
@@ -125,7 +125,7 @@ int cRingBufferLinear::Put(const uchar *Data, int Count)
         int percent = maxFill * 100 / (Size() - 1) / 5 * 5;
         if (abs(lastPercent - percent) >= 5) {
            if (percent > 75)
-              dsyslog("buffer usage: %d%% (pid=%d)", percent, getThreadPid);
+              dsyslog("buffer usage: %d%% (tid=%ld)", percent, getThreadTid);
            lastPercent = percent;
            }
         }
@@ -159,8 +159,8 @@ uchar *cRingBufferLinear::Get(int &Count)
 {
   uchar *p = NULL;
   Lock();
-  if (getThreadPid < 0)
-     getThreadPid = getpid();
+  if (getThreadTid <= 0)
+     getThreadTid = pthread_self();
   int rest = Size() - tail;
   if (rest < margin && head < tail) {
      int t = margin - rest;

ringbuffer.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: ringbuffer.h 1.12 2003/05/12 17:35:10 kls Exp $
+ * $Id: ringbuffer.h 1.13 2003/10/18 10:29:25 kls Exp $
  */
 
 #ifndef __RINGBUFFER_H
@@ -46,7 +46,7 @@ private:
   int margin, head, tail;
   int lastGet;
   uchar *buffer;
-  pid_t getThreadPid;
+  pthread_t getThreadTid;
 public:
   cRingBufferLinear(int Size, int Margin = 0, bool Statistics = false);
     ///< Creates a linear ring buffer.

thread.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: thread.c 1.25 2003/05/18 12:45:13 kls Exp $
+ * $Id: thread.c 1.26 2003/10/18 10:29:25 kls Exp $
  */
 
 #include "thread.h"
@@ -30,7 +30,7 @@ cCondVar::~cCondVar()
 
 void cCondVar::Wait(cMutex &Mutex)
 {
-  if (Mutex.locked && Mutex.lockingPid == getpid()) {
+  if (Mutex.locked && pthread_equal(Mutex.lockingTid, pthread_self())) {
      int locked = Mutex.locked;
      Mutex.locked = 0; // have to clear the locked count here, as pthread_cond_wait
                        // does an implizit unlock of the mutex
@@ -43,7 +43,7 @@ bool cCondVar::TimedWait(cMutex &Mutex, int TimeoutMs)
 {
   bool r = true; // true = condition signaled false = timeout
 
-  if (Mutex.locked && Mutex.lockingPid == getpid()) {
+  if (Mutex.locked && pthread_equal(Mutex.lockingTid, pthread_self())) {
      struct timeval now;                   // unfortunately timedwait needs the absolute time, not the delta :-(
      if (gettimeofday(&now, NULL) == 0) {  // get current time
         now.tv_usec += TimeoutMs * 1000;   // add the timeout
@@ -61,7 +61,7 @@ bool cCondVar::TimedWait(cMutex &Mutex, int TimeoutMs)
         if (pthread_cond_timedwait(&cond, &Mutex.mutex, &abstime) == ETIMEDOUT)
            r = false;
         Mutex.locked = locked;
-        Mutex.lockingPid = getpid();
+        Mutex.lockingTid = pthread_self();
         }
      }
   return r;
@@ -83,7 +83,7 @@ void cCondVar::Signal(void)
 
 cMutex::cMutex(void)
 {
-  lockingPid = 0;
+  lockingTid = 0;
   locked = 0;
   pthread_mutex_init(&mutex, NULL);
 }
@@ -95,9 +95,9 @@ cMutex::~cMutex()
 
 void cMutex::Lock(void)
 {
-  if (getpid() != lockingPid || !locked) {
+  if (!pthread_equal(lockingTid, pthread_self()) || !locked) {
      pthread_mutex_lock(&mutex);
-     lockingPid = getpid();
+     lockingTid = pthread_self();
      }
   locked++;
 }
@@ -105,7 +105,7 @@ void cMutex::Lock(void)
 void cMutex::Unlock(void)
 {
  if (!--locked) {
-    lockingPid = 0;
+    lockingTid = 0;
     pthread_mutex_unlock(&mutex);
     }
 }
@@ -125,7 +125,7 @@ cThread::cThread(void)
      signalHandlerInstalled = true;
      }
   running = false;
-  parentPid = threadPid = 0;
+  parentTid = childTid = 0;
 }
 
 cThread::~cThread()
@@ -139,8 +139,9 @@ void cThread::SignalHandler(int signum)
 
 void *cThread::StartThread(cThread *Thread)
 {
-  Thread->threadPid = getpid();
+  Thread->childTid = pthread_self();
   Thread->Action();
+  Thread->childTid = 0;
   return NULL;
 }
 
@@ -148,9 +149,9 @@ bool cThread::Start(void)
 {
   if (!running) {
      running = true;
-     parentPid = getpid();
-     pthread_create(&thread, NULL, (void *(*) (void *))&StartThread, (void *)this);
-     pthread_setschedparam(thread, SCHED_RR, 0);
+     parentTid = pthread_self();
+     pthread_create(&childTid, NULL, (void *(*) (void *))&StartThread, (void *)this);
+     pthread_setschedparam(childTid, SCHED_RR, 0);
      usleep(10000); // otherwise calling Active() immediately after Start() causes a "pure virtual method called" error
      }
   return true; //XXX return value of pthread_create()???
@@ -158,12 +159,21 @@ bool cThread::Start(void)
 
 bool cThread::Active(void)
 {
-  if (threadPid) {
-     if (kill(threadPid, SIGIO) < 0) { // couldn't find another way of checking whether the thread is still running - any ideas?
-        if (errno == ESRCH)
-           threadPid = 0;
-        else
+  if (childTid) {
+     //
+     // Single UNIX Spec v2 says:
+     //
+     // The pthread_kill() function is used to request
+     // that a signal be delivered to the specified thread.
+     //
+     // As in kill(), if sig is zero, error checking is
+     // performed but no signal is actually sent.
+     //
+     int err;
+     if ((err = pthread_kill(childTid, 0)) != 0) {
+        if (err != ESRCH)
            LOG_ERROR;
+        childTid = 0;
         }
      else
         return true;
@@ -180,14 +190,14 @@ void cThread::Cancel(int WaitSeconds)
             return;
          usleep(10000);
          }
-     esyslog("ERROR: thread %d won't end (waited %d seconds) - cancelling it...", threadPid, WaitSeconds);
+     esyslog("ERROR: thread %ld won't end (waited %d seconds) - cancelling it...", childTid, WaitSeconds);
      }
-  pthread_cancel(thread);
+  pthread_cancel(childTid);
 }
 
 void cThread::WakeUp(void)
 {
-  kill(parentPid, SIGIO); // makes any waiting 'select()' call return immediately
+  pthread_kill(parentTid, SIGIO); // makes any waiting 'select()' call return immediately
 }
 
 bool cThread::EmergencyExit(bool Request)

thread.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: thread.h 1.15 2003/05/03 14:03:36 kls Exp $
+ * $Id: thread.h 1.16 2003/10/18 10:29:25 kls Exp $
  */
 
 #ifndef __THREAD_H
@@ -32,7 +32,7 @@ class cMutex {
   friend class cCondVar;
 private:
   pthread_mutex_t mutex;
-  pid_t lockingPid;
+  pthread_t lockingTid;
   int locked;
 public:
   cMutex(void);
@@ -44,9 +44,8 @@ public:
 class cThread {
   friend class cThreadLock;
 private:
-  pthread_t thread;
+  pthread_t parentTid, childTid;
   cMutex mutex;
-  pid_t parentPid, threadPid;
   bool running;
   static bool emergencyExitRequested;
   static bool signalHandlerInstalled;