upstream/mercurial-mirror Files · contrib/python-zstandard/zstd/common/pool.h

rebase: move actual rebase into a single transaction...

rebase: move actual rebase into a single transaction Previously, rebasing would open several transaction over the course of rebasing several commits. Opening a transaction can have notable overhead (like copying the dirstate) which can add up when rebasing many commits. This patch adds a single large transaction around the actual commit rebase operation, with a catch for intervention which serializes the current state if we need to drop back to the terminal for user intervention. Amazingly, almost all the tests seem to pass. On large repos with large working copies, this can speed up rebasing 7 commits by 25%. I'd expect the percentage to be a bit larger for rebasing even more commits. There are minor test changes because we're rolling back the entire transaction during unexpected exceptions instead of just stopping mid-rebase, so there's no more backup bundle. It also leave an unknown file in the working copy, since our clean up 'hg update' doesn't delete unknown files.

Gregory Szorc - - Load All Authors

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      /**

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

       * All rights reserved.

       *

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

       * LICENSE file in the root directory of this source tree. An additional grant

       * of patent rights can be found in the PATENTS file in the same directory.

       */

      #ifndef POOL_H

      #define POOL_H

      #if defined (__cplusplus)

      extern "C" {

      #endif

      #include <stddef.h>   /* size_t */

      typedef struct POOL_ctx_s POOL_ctx;

      /*! POOL_create() :

          Create a thread pool with at most `numThreads` threads.

          `numThreads` must be at least 1.

          The maximum number of queued jobs before blocking is `queueSize`.

          `queueSize` must be at least 1.

          @return : The POOL_ctx pointer on success else NULL.

      */

      POOL_ctx *POOL_create(size_t numThreads, size_t queueSize);

      /*! POOL_free() :

          Free a thread pool returned by POOL_create().

      */

      void POOL_free(POOL_ctx *ctx);

      /*! POOL_function :

          The function type that can be added to a thread pool.

      */

      typedef void (*POOL_function)(void *);

      /*! POOL_add_function :

          The function type for a generic thread pool add function.

      */

      typedef void (*POOL_add_function)(void *, POOL_function, void *);

      /*! POOL_add() :

          Add the job `function(opaque)` to the thread pool.

          Possibly blocks until there is room in the queue.

          Note : The function may be executed asynchronously, so `opaque` must live until the function has been completed.

      */

      void POOL_add(void *ctx, POOL_function function, void *opaque);

      #if defined (__cplusplus)

      }

      #endif

      #endif

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				/**
				* Copyright (c) 2016-present, Facebook, Inc.
				* All rights reserved.
				*
				* This source code is licensed under the BSD-style license found in the
				* LICENSE file in the root directory of this source tree. An additional grant
				* of patent rights can be found in the PATENTS file in the same directory.
				*/
				#ifndef POOL_H
				#define POOL_H

				#if defined (__cplusplus)
				extern "C" {
				#endif


				#include <stddef.h> /* size_t */

				typedef struct POOL_ctx_s POOL_ctx;

				/*! POOL_create() :
				Create a thread pool with at most `numThreads` threads.
				`numThreads` must be at least 1.
				The maximum number of queued jobs before blocking is `queueSize`.
				`queueSize` must be at least 1.
				@return : The POOL_ctx pointer on success else NULL.
				*/
				POOL_ctx *POOL_create(size_t numThreads, size_t queueSize);

				/*! POOL_free() :
				Free a thread pool returned by POOL_create().
				*/
				void POOL_free(POOL_ctx *ctx);

				/*! POOL_function :
				The function type that can be added to a thread pool.
				*/
				typedef void (POOL_function)(void );
				/*! POOL_add_function :
				The function type for a generic thread pool add function.
				*/
				typedef void (POOL_add_function)(void , POOL_function, void *);

				/*! POOL_add() :
				Add the job `function(opaque)` to the thread pool.
				Possibly blocks until there is room in the queue.
				Note : The function may be executed asynchronously, so `opaque` must live until the function has been completed.
				*/
				void POOL_add(void ctx, POOL_function function, void opaque);


				#if defined (__cplusplus)
				}
				#endif

				#endif