Merge pull request #495 from isuruf/freethreading

Freethreading support

Author: isuruf

cmake/FindPython.cmake

@@ -22,26 +22,36 @@ execute_process(
 string(STRIP ${PYTHON_LIB_PATH} PYTHON_LIB_PATH)
 
 execute_process(
-	COMMAND ${PYTHON_BIN} -c "import sys; print(sys.prefix)"
-	OUTPUT_VARIABLE PYTHON_PREFIX_PATH
-	)
+    COMMAND ${PYTHON_BIN} -c "import sys; print(sys.prefix)"
+    OUTPUT_VARIABLE PYTHON_PREFIX_PATH
+)
 
 string(STRIP ${PYTHON_PREFIX_PATH} PYTHON_PREFIX_PATH)
 
 execute_process(
-	COMMAND ${PYTHON_BIN} -c "import sys; print('%s.%s' % sys.version_info[:2])"
+    COMMAND ${PYTHON_BIN} -c "import sys; print('%s.%s' % sys.version_info[:2])"
     OUTPUT_VARIABLE PYTHON_VERSION
-	)
+)
 string(STRIP ${PYTHON_VERSION} PYTHON_VERSION)
 message(STATUS "Python version: ${PYTHON_VERSION}")
 
 string(REPLACE "." "" PYTHON_VERSION_WITHOUT_DOTS ${PYTHON_VERSION})
 
+execute_process(
+    COMMAND ${PYTHON_BIN} -c "import sysconfig;print(bool(sysconfig.get_config_var('Py_GIL_DISABLED')))"
+    OUTPUT_VARIABLE PY_GIL_DISABLED
+)
+string(STRIP ${PY_GIL_DISABLED} PY_GIL_DISABLED)
+
+if ("${PY_GIL_DISABLED}" STREQUAL "True")
+  set (PY_THREAD "t")
+endif()
+
 if (${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
   FIND_LIBRARY(PYTHON_LIBRARY NAMES
-        python${PYTHON_VERSION}
+        python${PYTHON_VERSION}${PY_THREAD}
         python${PYTHON_VERSION}m
-        python${PYTHON_VERSION_WITHOUT_DOTS}
+        python${PYTHON_VERSION_WITHOUT_DOTS}${PY_THREAD}
       PATHS ${PYTHON_LIB_PATH} ${PYTHON_PREFIX_PATH}/lib ${PYTHON_PREFIX_PATH}/libs
       PATH_SUFFIXES ${CMAKE_LIBRARY_ARCHITECTURE}
       NO_DEFAULT_PATH
@@ -51,8 +61,8 @@ endif()
 
 execute_process(
     COMMAND ${PYTHON_BIN} -c "from sysconfig import get_paths; print(get_paths()['purelib'])"
-	OUTPUT_VARIABLE PYTHON_INSTALL_PATH_tmp
-	)
+    OUTPUT_VARIABLE PYTHON_INSTALL_PATH_tmp
+)
 string(STRIP ${PYTHON_INSTALL_PATH_tmp} PYTHON_INSTALL_PATH_tmp)
 set(PYTHON_INSTALL_PATH ${PYTHON_INSTALL_PATH_tmp}
     CACHE BOOL "Python install path")
@@ -129,5 +139,9 @@ macro(ADD_PYTHON_LIBRARY name)
     IF(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
         target_link_libraries(${name} ${PYTHON_LIBRARY})
         set_target_properties(${name} PROPERTIES SUFFIX ".pyd")
+        IF("${PY_GIL_DISABLED}" STREQUAL "True")
+            target_compile_definitions(${name} PRIVATE Py_GIL_DISABLED=1)
+        ENDIF()
     ENDIF()
+
 endmacro(ADD_PYTHON_LIBRARY)

cmake/cython_test.pyx

@@ -75,8 +75,8 @@ cdef extern from "<symengine/symbol.h>" namespace "SymEngine":
         string get_name() nogil
 
 cdef extern from "<symengine/add.h>" namespace "SymEngine":
-    cdef RCP[Basic] add(RCP[Basic] &a, RCP[Basic] &b) nogil except+
-    cdef RCP[Basic] sub(RCP[Basic] &a, RCP[Basic] &b) nogil except+
+    cdef RCP[Basic] add(RCP[Basic] &a, RCP[Basic] &b) except+ nogil
+    cdef RCP[Basic] sub(RCP[Basic] &a, RCP[Basic] &b) except+ nogil
 
     cdef cppclass Add(Basic):
         void as_two_terms(const Ptr[RCP[Basic]] &a, const Ptr[RCP[Basic]] &b)