Virtualize and allow overriding of thread creation function, to allow Wine support (from JACK1).

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3437 0c269be4-1314-0410-8aa9-9f06e86f4224

ChangeLog

@@ -24,6 +24,10 @@ Torben Hohn
   Jackdmp changes log
 ---------------------------
 
+2009-03-12 Stephane Letz  <letz@grame.fr>
+
+        * Virtualize and allow overriding of thread creation function, to allow Wine support (from JACK1).
+
 2009-03-12 Stephane Letz  <letz@grame.fr>
 
         * Try automatic adaptative mode in adapters.

common/JackAPI.cpp

@@ -222,6 +222,7 @@ extern "C"
     
     EXPORT int jack_client_stop_thread (jack_client_t* client, pthread_t thread);
     EXPORT int jack_client_kill_thread (jack_client_t* client, pthread_t thread);
+    EXPORT void jack_set_thread_creator (jack_thread_creator_t jtc);
 
     EXPORT char * jack_get_internal_client_name (jack_client_t *client,
             jack_intclient_t intclient);
@@ -1792,6 +1793,11 @@ EXPORT int jack_client_kill_thread(jack_client_t* client, pthread_t thread)
     return JackThread::KillImp(thread);
 }
 
+EXPORT void jack_set_thread_creator (jack_thread_creator_t jtc)
+{
+    JackGlobals::fJackThreadCreator = jtc;
+}
+
 // intclient.h
 EXPORT int jack_internal_client_new (const char *client_name,
                                      const char *load_name,

common/JackGlobals.cpp

@@ -32,4 +32,6 @@ JackMutex* JackGlobals::fOpenMutex = new JackMutex();
 bool JackGlobals::fServerRunning = false;
 JackClient* JackGlobals::fClientTable[CLIENT_NUM] = {};
 
+jack_thread_creator_t JackGlobals::fJackThreadCreator = pthread_create; 
+
 } // end of namespace

common/JackGlobals.h

@@ -36,6 +36,7 @@ struct JackGlobals {
     static JackMutex* fOpenMutex;
     static bool fServerRunning;
     static JackClient* fClientTable[];
+    static jack_thread_creator_t fJackThreadCreator; 
     
 };
 

common/jack/thread.h

@@ -117,6 +117,29 @@ int jack_client_stop_thread(jack_client_t* client, pthread_t thread);
  */    
  int jack_client_kill_thread(jack_client_t* client, pthread_t thread);
 
+ typedef int (*jack_thread_creator_t)(pthread_t*,
+				     const pthread_attr_t*,
+				     void* (*function)(void*),
+				     void* arg);
+/**
+ * This function can be used in very very specialized cases
+ * where it is necessary that client threads created by JACK
+ * are created by something other than pthread_create(). After
+ * it is used, any threads that JACK needs for the client will
+ * will be created by calling the function passed to this
+ * function. 
+ *
+ * No normal application/client should consider calling this.
+ * The specific case for which it was created involves running
+ * win32/x86 plugins under Wine on Linux, where it is necessary
+ * that all threads that might call win32 functions are known
+ * to Wine.
+ * 
+ * @param creator a function that creates a new thread
+ * 
+ */
+void jack_set_thread_creator (jack_thread_creator_t creator);
+
 /* @} */
 
 #ifdef __cplusplus

posix/JackPosixThread.cpp

@@ -21,6 +21,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #include "JackPosixThread.h"
 #include "JackError.h"
 #include "JackTime.h"
+#include "JackGlobals.h"
 #include <string.h> // for memset
 #include <unistd.h> // for _POSIX_PRIORITY_SCHEDULING check
 
@@ -139,7 +140,7 @@ int JackPosixThread::StartImp(pthread_t* thread, int priority, int realtime, voi
         return -1;
     }
 
-    if ((res = pthread_create(thread, &attributes, start_routine, arg))) {
+    if ((res = JackGlobals::fJackThreadCreator(thread, &attributes, start_routine, arg))) {
         jack_error("Cannot create thread res = %d err = %s", res, strerror(errno));
         return -1;
     }

posix/JackTypes_os.h

@@ -26,4 +26,6 @@
 typedef unsigned long long UInt64;
 typedef pthread_key_t jack_tls_key;
 
+typedef int (*jack_thread_creator_t)(pthread_t*, const pthread_attr_t*, void* (*function)(void*), void* arg);
+
 #endif