upstream/mercurial-mirror Files · contrib/python-zstandard/zstd/deprecated/zbuff_common.c

worker: ability to disable thread unsafe tasks...

worker: ability to disable thread unsafe tasks The worker on Windows is implemented using a thread pool. If worker tasks are not thread safe, badness can occur. In addition, if tasks are executing CPU bound code and holding onto the GIL, there will be non-substantial overhead in Python context switching between active threads. This can result in significant slowdowns of tasks. This commit teaches the code for determining whether to use a worker to take thread safety into account. Effectively, thread unsafe tasks don't use the thread-based worker on Windows. Differential Revision: https://phab.mercurial-scm.org/D3962

Gregory Szorc - - Load All Authors

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      /*

       * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.

       * All rights reserved.

       *

       * This source code is licensed under both the BSD-style license (found in the

       * LICENSE file in the root directory of this source tree) and the GPLv2 (found

       * in the COPYING file in the root directory of this source tree).

       * You may select, at your option, one of the above-listed licenses.

       */

      /*-*************************************

      *  Dependencies

      ***************************************/

      #include "error_private.h"

      #include "zbuff.h"

      /*-****************************************

      *  ZBUFF Error Management  (deprecated)

      ******************************************/

      /*! ZBUFF_isError() :

      *   tells if a return value is an error code */

      unsigned ZBUFF_isError(size_t errorCode) { return ERR_isError(errorCode); }

      /*! ZBUFF_getErrorName() :

      *   provides error code string from function result (useful for debugging) */

      const char* ZBUFF_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); }

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				/*
				* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
				* All rights reserved.
				*
				* This source code is licensed under both the BSD-style license (found in the
				* LICENSE file in the root directory of this source tree) and the GPLv2 (found
				* in the COPYING file in the root directory of this source tree).
				* You may select, at your option, one of the above-listed licenses.
				*/

				/-************************************
				* Dependencies
				***************************************/
				#include "error_private.h"
				#include "zbuff.h"

				/-***************************************
				* ZBUFF Error Management (deprecated)
				******************************************/

				/*! ZBUFF_isError() :
				* tells if a return value is an error code */
				unsigned ZBUFF_isError(size_t errorCode) { return ERR_isError(errorCode); }
				/*! ZBUFF_getErrorName() :
				* provides error code string from function result (useful for debugging) */
				const char* ZBUFF_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); }