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5c75f37d47
Change PyAPI_FUNC(type), PyAPI_DATA(type) and PyMODINIT_FUNC macros of pyport.h when Py_BUILD_CORE_MODULE is defined. The Py_BUILD_CORE_MODULE define must be now be used to build a C extension as a dynamic library accessing Python internals: export the PyInit_xxx() function in DLL exports on Windows. Changes: * Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE now imply Py_BUILD_CORE directy in pyport.h. * ceval.c compilation now fails with an error if Py_BUILD_CORE is not defined, just to ensure that Python is build with the correct defines. * setup.py now compiles _pickle.c with Py_BUILD_CORE_MODULE define. * setup.py compiles _json.c with Py_BUILD_CORE_MODULE define, rather than Py_BUILD_CORE_BUILTIN define * PCbuild/pythoncore.vcxproj: Add Py_BUILD_CORE_BUILTIN define.
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#ifndef Py_INTERNAL_GIL_H
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#define Py_INTERNAL_GIL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_condvar.h"
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#include "pycore_atomic.h"
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#ifndef Py_HAVE_CONDVAR
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# error You need either a POSIX-compatible or a Windows system!
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#endif
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/* Enable if you want to force the switching of threads at least
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every `interval`. */
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#undef FORCE_SWITCHING
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#define FORCE_SWITCHING
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struct _gil_runtime_state {
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/* microseconds (the Python API uses seconds, though) */
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unsigned long interval;
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/* Last PyThreadState holding / having held the GIL. This helps us
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know whether anyone else was scheduled after we dropped the GIL. */
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_Py_atomic_address last_holder;
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/* Whether the GIL is already taken (-1 if uninitialized). This is
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atomic because it can be read without any lock taken in ceval.c. */
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_Py_atomic_int locked;
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/* Number of GIL switches since the beginning. */
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unsigned long switch_number;
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/* This condition variable allows one or several threads to wait
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until the GIL is released. In addition, the mutex also protects
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the above variables. */
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PyCOND_T cond;
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PyMUTEX_T mutex;
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#ifdef FORCE_SWITCHING
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/* This condition variable helps the GIL-releasing thread wait for
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a GIL-awaiting thread to be scheduled and take the GIL. */
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PyCOND_T switch_cond;
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PyMUTEX_T switch_mutex;
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#endif
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_GIL_H */
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