RecursiveMutex.cxx

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#include <cassert>
#include <cerrno>

#include "rutil/RecursiveMutex.hxx"

#if defined(WIN32) 
#  include <windows.h>
#  include <winbase.h>
#else
#  include <pthread.h>
#endif

#if defined(__INTEL_COMPILER)
// !rk! hack, I'm not sure off hand why the Intel compiler can't find this
extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind)
   __THROW;
#endif

using resip::RecursiveMutex;

// !abr! I can't find evidence that the Intel C++ Compiler has any issues
// with the use of recursive mutexes. The need for this exception should
// be re-verified and documented here.

// .abr. .amr. OS X 10.2 is 1020. Prior to this, OS X did not support
// recursive mutexes. The iPhone Macro will be defined for all iPhone SDK based
// compiles which properly supports recursive mutexes

#if (defined( __APPLE__ ) && (defined(MAC_OS_X_VERSION_MIN_REQUIRED) && (MAC_OS_X_VERSION_MIN_REQUIRED < 1020) && !defined(TARGET_OS_IPHONE))) || defined (__INTEL_COMPILER)
// !cj! need to write intel mutex stuff 

#warning "RecursiveMutex is not available on this platform yet."

namespace resip
{

RecursiveMutex::RecursiveMutex()
{
   assert(0); 
}


RecursiveMutex::~RecursiveMutex ()
{
   assert(0);
}


void
RecursiveMutex::lock()
{
   assert(0); 
}

void
RecursiveMutex::unlock()
{
   assert(0); 
}

}

#else

namespace resip
{

RecursiveMutex::RecursiveMutex()
{
#ifndef WIN32
   int rc = pthread_mutexattr_init(&mMutexAttr);
 #if defined(__linux__)
   pthread_mutexattr_settype(&mMutexAttr, PTHREAD_MUTEX_RECURSIVE_NP);
 #else
   pthread_mutexattr_settype(&mMutexAttr, PTHREAD_MUTEX_RECURSIVE);
 #endif

   rc = pthread_mutex_init(&mId, &mMutexAttr);
   assert( rc == 0 );
#else
        InitializeCriticalSection(&mId);
#endif
}


RecursiveMutex::~RecursiveMutex ()
{
#ifndef WIN32
    int  rc = pthread_mutex_destroy(&mId);
    assert( rc != EBUSY );  // currently locked 
    assert( rc == 0 );
    rc = pthread_mutexattr_destroy(&mMutexAttr);
#else
        DeleteCriticalSection(&mId);
#endif
}


void
RecursiveMutex::lock()
{
#ifndef WIN32
    int  rc = pthread_mutex_lock(&mId);
    (void)rc;
    assert( rc != EINVAL );
    assert( rc != EDEADLK );
    assert( rc == 0 );
#else
        EnterCriticalSection(&mId);
#endif
}

void
RecursiveMutex::unlock()
{
#ifndef WIN32
    int  rc = pthread_mutex_unlock(&mId);
    (void)rc;
    assert( rc != EINVAL );
    assert( rc != EPERM );
    assert( rc == 0 );
#else
        LeaveCriticalSection(&mId);
#endif
}

#ifndef WIN32
pthread_mutex_t*
RecursiveMutex::getId() const
{
    return ( &mId );
}
#endif

}

#endif

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