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kumquat-buildroot/package/opencv3/0002-fix-support-for-pthreads-parallel_for.patch
Samuel Martin 3ba8dc3561 package: rename opencv -> opencv3 
Since there is a couple of API breaks between OpenCV 2.4 and 3.0, two
distinct packages mutually exclusive will be integrated in the package
tree.

So, this change prepares the re-introduction of the OpenCV-2.4 package
by renaming the current opencv package (which provides OpenCV-3.0) to
opencv3.

Reverse dependencies (vlc) is fixed to use the new symbols.

Cc: Jonathan Ben Avraham <yba@tkos.co.il>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
[yann.morin.1998@free.fr:
  - fix missed usage in vlc.mk
  - don't remove legacy OpenCV symbols
  - fix 'endif' comment
  - slightly reword commit log (reverse deps)
]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-08-25 11:51:35 +02:00

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Backport from https://github.com/Itseez/opencv/commit/a482dcce464acbd5368fb93c6c3d52ba8401776a
From a482dcce464acbd5368fb93c6c3d52ba8401776a Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@itseez.com>
Date: Thu, 11 Jun 2015 16:53:07 +0300
Subject: [PATCH] fix support for pthreads parallel_for
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
---
CMakeLists.txt | 29 ++++++++++++++++++++++-------
cmake/OpenCVFindLibsPerf.cmake | 14 +++++++++-----
cmake/templates/cvconfig.h.in | 6 ++++++
modules/core/src/parallel.cpp | 13 ++++++++-----
modules/core/src/parallel_pthreads.cpp | 2 +-
modules/core/src/precomp.hpp | 6 ------
6 files changed, 46 insertions(+), 24 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9a17b3..27d8470 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -188,7 +188,7 @@ OCV_OPTION(WITH_QUICKTIME "Use QuickTime for Video I/O insted of QTKit" OFF
OCV_OPTION(WITH_TBB "Include Intel TBB support" OFF IF (NOT IOS AND NOT WINRT) )
OCV_OPTION(WITH_OPENMP "Include OpenMP support" OFF)
OCV_OPTION(WITH_CSTRIPES "Include C= support" OFF IF (WIN32 AND NOT WINRT) )
-OCV_OPTION(WITH_PTHREADS_PF "Use pthreads-based parallel_for" OFF IF (NOT WIN32) )
+OCV_OPTION(WITH_PTHREADS_PF "Use pthreads-based parallel_for" ON IF (NOT WIN32) )
OCV_OPTION(WITH_TIFF "Include TIFF support" ON IF (NOT IOS) )
OCV_OPTION(WITH_UNICAP "Include Unicap support (GPL)" OFF IF (UNIX AND NOT APPLE AND NOT ANDROID) )
OCV_OPTION(WITH_V4L "Include Video 4 Linux support" ON IF (UNIX AND NOT ANDROID) )
@@ -1026,6 +1026,27 @@ if(DEFINED WITH_GPHOTO2)
endif(DEFINED WITH_GPHOTO2)
+# Order is similar to CV_PARALLEL_FRAMEWORK in core/src/parallel.cpp
+ocv_clear_vars(CV_PARALLEL_FRAMEWORK)
+if(HAVE_TBB)
+ set(CV_PARALLEL_FRAMEWORK "TBB (ver ${TBB_VERSION_MAJOR}.${TBB_VERSION_MINOR} interface ${TBB_INTERFACE_VERSION})")
+elseif(HAVE_CSTRIPES)
+ set(CV_PARALLEL_FRAMEWORK "C=")
+elseif(HAVE_OPENMP)
+ set(CV_PARALLEL_FRAMEWORK "OpenMP")
+elseif(HAVE_GCD)
+ set(CV_PARALLEL_FRAMEWORK "GCD")
+elseif(WINRT OR HAVE_CONCURRENCY)
+ set(CV_PARALLEL_FRAMEWORK "Concurrency")
+elseif(HAVE_PTHREADS_PF)
+ set(CV_PARALLEL_FRAMEWORK "pthreads")
+else()
+ set(CV_PARALLEL_FRAMEWORK "none")
+endif()
+status("")
+status(" Parallel framework:" TRUE THEN "${CV_PARALLEL_FRAMEWORK}" ELSE NO)
+
+
# ========================== Other third-party libraries ==========================
status("")
status(" Other third-party libraries:")
@@ -1045,12 +1066,6 @@ status(" Use IPP Async:" HAVE_IPP_A THEN "YES" ELSE NO)
endif(DEFINED WITH_IPP_A)
status(" Use Eigen:" HAVE_EIGEN THEN "YES (ver ${EIGEN_WORLD_VERSION}.${EIGEN_MAJOR_VERSION}.${EIGEN_MINOR_VERSION})" ELSE NO)
-status(" Use TBB:" HAVE_TBB THEN "YES (ver ${TBB_VERSION_MAJOR}.${TBB_VERSION_MINOR} interface ${TBB_INTERFACE_VERSION})" ELSE NO)
-status(" Use OpenMP:" HAVE_OPENMP THEN YES ELSE NO)
-status(" Use GCD" HAVE_GCD THEN YES ELSE NO)
-status(" Use Concurrency" HAVE_CONCURRENCY THEN YES ELSE NO)
-status(" Use C=:" HAVE_CSTRIPES THEN YES ELSE NO)
-status(" Use pthreads for parallel for:" HAVE_PTHREADS_PF THEN YES ELSE NO)
status(" Use Cuda:" HAVE_CUDA THEN "YES (ver ${CUDA_VERSION_STRING})" ELSE NO)
status(" Use OpenCL:" HAVE_OPENCL THEN YES ELSE NO)
diff --git a/cmake/OpenCVFindLibsPerf.cmake b/cmake/OpenCVFindLibsPerf.cmake
index bda5d79..d1bc541 100644
--- a/cmake/OpenCVFindLibsPerf.cmake
+++ b/cmake/OpenCVFindLibsPerf.cmake
@@ -120,12 +120,16 @@ if(WITH_OPENMP)
set(HAVE_OPENMP "${OPENMP_FOUND}")
endif()
-if(UNIX OR ANDROID)
-if(NOT APPLE AND NOT HAVE_TBB AND NOT HAVE_OPENMP)
- set(HAVE_PTHREADS_PF 1)
-else()
- set(HAVE_PTHREADS_PF 0)
+if(NOT MSVC AND NOT DEFINED HAVE_PTHREADS)
+ set(_fname "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/pthread_test.cpp")
+ file(WRITE "${_fname}" "#include <pthread.h>\nint main() { (void)pthread_self(); return 0; }\n")
+ try_compile(HAVE_PTHREADS "${CMAKE_BINARY_DIR}" "${_fname}")
+ file(REMOVE "${_fname}")
endif()
+
+ocv_clear_vars(HAVE_PTHREADS_PF)
+if(WITH_PTHREADS_PF)
+ set(HAVE_PTHREADS_PF ${HAVE_PTHREADS})
else()
set(HAVE_PTHREADS_PF 0)
endif()
diff --git a/cmake/templates/cvconfig.h.in b/cmake/templates/cvconfig.h.in
index 4a1d1c6..3330774 100644
--- a/cmake/templates/cvconfig.h.in
+++ b/cmake/templates/cvconfig.h.in
@@ -139,6 +139,12 @@
/* PNG codec */
#cmakedefine HAVE_PNG
+/* Posix threads (pthreads) */
+#cmakedefine HAVE_PTHREADS
+
+/* parallel_for with pthreads */
+#cmakedefine HAVE_PTHREADS_PF
+
/* Qt support */
#cmakedefine HAVE_QT
diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index 0b593ee..caa8129 100644
--- a/modules/core/src/parallel.cpp
+++ b/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
diff --git a/modules/core/src/parallel_pthreads.cpp b/modules/core/src/parallel_pthreads.cpp
index 8c34959..091ea2d 100644
--- a/modules/core/src/parallel_pthreads.cpp
+++ b/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>
diff --git a/modules/core/src/precomp.hpp b/modules/core/src/precomp.hpp
index d463126..88b60e4 100644
--- a/modules/core/src/precomp.hpp
+++ b/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)
--
2.4.4
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