fix support for pthreads parallel_for

modules/core/src/parallel.cpp

@@ -80,6 +80,7 @@
    4. HAVE_GCD         - system wide, used automatically        (APPLE only)
    5. WINRT            - system wide, used automatically        (Windows RT only)
    6. HAVE_CONCURRENCY - part of runtime, used automatically    (Windows only - MSVS 10, MSVS 11)
+   7. HAVE_PTHREADS_PF - pthreads if available
 */
 
 #if defined HAVE_TBB
@@ -125,14 +126,14 @@
 #  define CV_PARALLEL_FRAMEWORK "winrt-concurrency"
 #elif defined HAVE_CONCURRENCY
 #  define CV_PARALLEL_FRAMEWORK "ms-concurrency"
-#elif defined HAVE_PTHREADS
+#elif defined HAVE_PTHREADS_PF
 #  define CV_PARALLEL_FRAMEWORK "pthreads"
 #endif
 
 namespace cv
 {
     ParallelLoopBody::~ParallelLoopBody() {}
-#if defined HAVE_PTHREADS && HAVE_PTHREADS
+#ifdef HAVE_PTHREADS_PF
     void parallel_for_pthreads(const cv::Range& range, const cv::ParallelLoopBody& body, double nstripes);
     size_t parallel_pthreads_get_threads_num();
     void parallel_pthreads_set_threads_num(int num);
@@ -306,7 +307,7 @@ void cv::parallel_for_(const cv::Range& range, const cv::ParallelLoopBody& body,
             Concurrency::CurrentScheduler::Detach();
         }
 
-#elif defined HAVE_PTHREADS
+#elif defined HAVE_PTHREADS_PF
 
         parallel_for_pthreads(range, body, nstripes);
 
@@ -365,7 +366,7 @@ int cv::getNumThreads(void)
         ? Concurrency::CurrentScheduler::Get()->GetNumberOfVirtualProcessors()
         : pplScheduler->GetNumberOfVirtualProcessors());
 
-#elif defined HAVE_PTHREADS
+#elif defined HAVE_PTHREADS_PF
 
         return parallel_pthreads_get_threads_num();
 
@@ -426,7 +427,7 @@ void cv::setNumThreads( int threads )
                        Concurrency::MaxConcurrency, threads-1));
     }
 
-#elif defined HAVE_PTHREADS
+#elif defined HAVE_PTHREADS_PF
 
     parallel_pthreads_set_threads_num(threads);
 
@@ -452,6 +453,8 @@ int cv::getThreadNum(void)
     return 0;
 #elif defined HAVE_CONCURRENCY
     return std::max(0, (int)Concurrency::Context::VirtualProcessorId()); // zero for master thread, unique number for others but not necessary 1,2,3,...
+#elif defined HAVE_PTHREADS_PF
+    return (int)(size_t)(void*)pthread_self(); // no zero-based indexing
 #else
     return 0;
 #endif

modules/core/src/parallel_pthreads.cpp

@@ -42,7 +42,7 @@
 
 #include "precomp.hpp"
 
-#if defined HAVE_PTHREADS && HAVE_PTHREADS
+#ifdef HAVE_PTHREADS_PF
 
 #include <algorithm>
 #include <pthread.h>

modules/core/src/precomp.hpp

@@ -292,12 +292,6 @@ TLSData<CoreTLSData>& getCoreTlsData();
 #define CL_RUNTIME_EXPORT
 #endif
 
-#ifndef HAVE_PTHREADS
-#if !(defined WIN32 || defined _WIN32 || defined WINCE || defined HAVE_WINRT)
-#define HAVE_PTHREADS 1
-#endif
-#endif
-
 extern bool __termination; // skip some cleanups, because process is terminating
                            // (for example, if ExitProcess() was already called)