upstream/mercurial-mirror Files · contrib/chg/procutil.h

phases: avoid N² behavior in `advanceboundary`...

phases: avoid N² behavior in `advanceboundary` We allowed duplicated entries in the deque, which each entry could potentially insert all its ancestors. So advancing boundary for the full repository would mean each revision would walk all its ancestors, resulting in O(N²) iteration. For repository of any decent size, N² is quickly insane. We introduce a simple set to avoid this and get back to reasonable performance.

Jun Wu - - Load All Authors

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      /*

       * Utilities about process handling - signal and subprocess (ex. pager)

       *

       * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>

       *

       * This software may be used and distributed according to the terms of the

       * GNU General Public License version 2 or any later version.

       */

      #ifndef PROCUTIL_H_

      #define PROCUTIL_H_

      #include <unistd.h>

      void restoresignalhandler(void);

      void setupsignalhandler(pid_t pid, pid_t pgid);

      pid_t setuppager(const char *pagercmd, const char *envp[]);

      void waitpager(void);

      #endif /* PROCUTIL_H_ */

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				/*
				* Utilities about process handling - signal and subprocess (ex. pager)
				*
				* Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>
				*
				* This software may be used and distributed according to the terms of the
				* GNU General Public License version 2 or any later version.
				*/

				#ifndef PROCUTIL_H_
				#define PROCUTIL_H_

				#include <unistd.h>

				void restoresignalhandler(void);
				void setupsignalhandler(pid_t pid, pid_t pgid);

				pid_t setuppager(const char pagercmd, const char envp[]);
				void waitpager(void);

				#endif /* PROCUTIL_H_ */