SF Tracker [ 1663004 ] Compile on Cygwin

Submitted By: Jon Foster - jongfoster
	This patch gives basic support for building under Cygwin - it compiles,
	links, and a simple UPnP device application can initialise. I'm not sure
	if it actually works yet, but this is definitely a step in the right
	direction.
	
	Patch is against the 1.4.1 release. Changes are:
	
	* threadutil/inc/ithread.h: Fix the ithread mutex support to use
	documented, portable APIs (if present) rather than the Non-Portable (_NP)
	ones it uses now. This is required because Cygwin implements only the
	portable API.
	
	* threadutil/src/ThreadPool.c: Fake SetPolicyType() to do nothing on Cygwin
	because otherwise it fails. Should probably investigate why it fails and
	add a proper implementation later.
	
	* upnp/src/api/upnpapi.c: On Cygwin, zero out the GlobalHndMutex structure
	before initialising it. Without this, the initialisation fails. This
	appears to be a bug in Cygwin.
	
	* upnp/src/genlib/net/uri/uri.c: Use gethostbyname() on Cygwin.



git-svn-id: https://pupnp.svn.sourceforge.net/svnroot/pupnp/trunk@151 119443c7-1b9e-41f8-b6fc-b9c35fce742c

threadutil/inc/ithread.h

@@ -47,11 +47,21 @@ extern "C" {
  #include <unistd.h>
 #endif
 
+#ifdef PTHREAD_MUTEX_RECURSIVE
+/* This system has SuS2-compliant mutex attributes.
+ * E.g. on Cygwin, where we don't have the old nonportable (NP) symbols
+ */
+#define ITHREAD_MUTEX_FAST_NP PTHREAD_MUTEX_NORMAL
+#define ITHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE
+#define ITHREAD_MUTEX_ERRORCHECK_NP PTHREAD_MUTEX_ERRORCHECK
+#else
 #define ITHREAD_MUTEX_FAST_NP PTHREAD_MUTEX_FAST_NP
 #define ITHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE_NP
 #define ITHREAD_MUTEX_ERRORCHECK_NP PTHREAD_MUTEX_ERRORCHECK_NP
+#endif
+
 #define ITHREAD_CANCELED PTHREAD_CANCELED
-  
+
   
   /***************************************************************************
    * Name: ithread_t
@@ -181,8 +191,11 @@ extern "C" {
  *      Returns EINVAL if the kind is not supported.
  *      See man page for pthread_mutexattr_setkind_np
  *****************************************************************************/
+#ifdef PTHREAD_MUTEX_RECURSIVE
+#define ithread_mutexattr_setkind_np pthread_mutexattr_settype
+#else
 #define ithread_mutexattr_setkind_np pthread_mutexattr_setkind_np
-
+#endif
 
 /****************************************************************************
  * Function: ithread_mutexattr_getkind_np
@@ -203,7 +216,11 @@ extern "C" {
  *      Always returns 0.
  *      See man page for pthread_mutexattr_getkind_np
  *****************************************************************************/
+#ifdef PTHREAD_MUTEX_RECURSIVE
+#define ithread_mutexattr_getkind_np pthread_mutexattr_gettype
+#else
 #define ithread_mutexattr_getkind_np pthread_mutexattr_getkind_np
+#endif
 
   
 /****************************************************************************
@@ -542,8 +559,10 @@ extern "C" {
 #endif
 
 
+#ifndef PTHREAD_MUTEX_RECURSIVE
 //NK: Added for satisfying the gcc compiler  
 EXPORT_SPEC int pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);
+#endif
 
 #ifdef __cplusplus
 }

threadutil/src/ThreadPool.c

@@ -90,6 +90,10 @@ FreeThreadPoolJob( ThreadPool * tp,
 static int
 SetPolicyType( PolicyType in )
 {
+    #ifdef __CYGWIN__
+     /* TODO not currently working... */
+     return 0;
+    #else
     #ifdef WIN32
      return sched_setscheduler( 0, in);
     #else
@@ -99,6 +103,7 @@ SetPolicyType( PolicyType in )
      current.sched_priority = DEFAULT_SCHED_PARAM;
      return sched_setscheduler( 0, in, &current );
     #endif
+    #endif
 }
 
 /****************************************************************************