Automatically save a snapshot when close()'ing a project.
This snapshot, if up-to-date, may be used to accellerate loading of projects with very long histories.pull/3/head
Jonathan Moore Liles
parent
c3603a8bfd
commit
f093abb887
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@ -25,6 +25,8 @@
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#include <stdarg.h>
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#include <string.h>
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#include "util/file.h"
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#include <algorithm>
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using std::min;
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using std::max;
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@ -49,34 +51,57 @@ Loggable::open ( const char *filename )
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{
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FILE *fp;
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Loggable::_fp = NULL;
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if ( ! ( fp = fopen( filename, "a+" ) ) )
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{
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WARNING( "Could not open log file for writing!" );
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return false;
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}
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/* replay log */
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if ( newer( "snapshot", filename ) )
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{
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/* FIXME: bogus */
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char buf[BUFSIZ];
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DMESSAGE( "Loading snapshot" );
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while ( fscanf( fp, "%[^\n]\n", buf ) == 1 )
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{
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if ( ! ( ! strcmp( buf, "{" ) || ! strcmp( buf, "}" ) ) )
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{
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if ( *buf == '\t' )
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do_this( buf + 1, false );
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else
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do_this( buf, false );
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}
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}
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FILE *fp = fopen( "snapshot", "r" );
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replay( fp );
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fclose( fp );
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}
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else
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{
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DMESSAGE( "Replaying journal" );
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replay( fp );
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}
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fseek( fp, 0, SEEK_END );
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Loggable::_fp = fp;
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return true;
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}
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/** replay journal or snapshot */
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bool
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Loggable::replay ( FILE *fp )
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{
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/* FIXME: bogus */
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char buf[BUFSIZ];
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while ( fscanf( fp, "%[^\n]\n", buf ) == 1 )
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{
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if ( ! ( ! strcmp( buf, "{" ) || ! strcmp( buf, "}" ) ) )
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{
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if ( *buf == '\t' )
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do_this( buf + 1, false );
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else
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do_this( buf, false );
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}
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}
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}
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/** close journal and delete all loggable objects, returing the systemt to a blank slate */
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bool
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Loggable::close ( void )
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@ -91,6 +116,8 @@ Loggable::close ( void )
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_fp = NULL;
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snapshot( "snapshot" );
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for ( int i = 0; i < _log_id - 1; ++i )
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{
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Loggable ** l = &_loggables[ i ];
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@ -333,10 +360,11 @@ Loggable::undo ( void )
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delete[] buf;
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}
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/* FIXME: we need a version of this that is fully const, right? */
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/** write a snapshot of the state of all loggable objects, sufficient
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* for later reconstruction, to /fp/ */
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bool
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Loggable::snapshot( FILE *fp )
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Loggable::snapshot ( FILE *fp )
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{
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FILE *ofp = _fp;
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@ -380,6 +408,19 @@ Loggable::snapshot( FILE *fp )
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return true;
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}
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bool
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Loggable::snapshot ( const char *name )
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{
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FILE *fp;
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if ( ! ( fp = fopen( name, "w" ) ))
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return false;
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snapshot( fp );
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fclose( fp );
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}
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/** Replace the journal with a snapshot of the current state */
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void
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Loggable::compact ( void )
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@ -396,6 +437,9 @@ Loggable::compact ( void )
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void
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Loggable::log ( const char *fmt, ... )
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{
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if ( ! _fp )
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return;
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/* FIXME: bogus limit */
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static char buf[1024];
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static int i = 0;
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@ -490,7 +534,7 @@ Loggable::log_print( const Log_Entry *o, const Log_Entry *n ) const
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o->get( i, &s, &v );
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log( "%s %s%s", s, o->size() == i + 1 ? "" : " " );
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log( "%s %s%s", s, v, o->size() == i + 1 ? "" : " " );
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}
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}
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@ -550,13 +594,20 @@ Loggable::log_end ( void )
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void
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Loggable::log_create ( void ) const
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{
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if ( ! _fp )
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/* replaying, don't bother */
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return;
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log( "%s 0x%X create ", class_name(), _id );
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Log_Entry e;
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get( e );
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log_print( NULL, &e );
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if ( e.size() )
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log_print( NULL, &e );
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else
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log( "\n" );
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if ( Loggable::_level == 0 )
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Loggable::flush();
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@ -104,16 +104,10 @@ private:
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static void log ( const char *fmt, ... );
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static void flush ( void );
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static
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void indent ( void )
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{
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int n = Loggable::_level;
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while ( n-- )
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log( "\t" );
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}
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static bool snapshot( FILE * fp );
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static bool snapshot( const char *name );
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static bool replay ( FILE *fp );
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void init ( bool loggable=true )
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{
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@ -4,7 +4,7 @@ Timeline_VERSION := 0.5.0
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Timeline_SRCS := $(wildcard Timeline/*.C Timeline/*.fl Timeline/Engine/*.C)
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Timeline_SRCS += util/debug.C util/Thread.C
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Timeline_SRCS += util/debug.C util/Thread.C util/file.C
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Timeline_SRCS:=$(Timeline_SRCS:.fl=.C)
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Timeline_SRCS:=$(sort $(Timeline_SRCS))
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@ -0,0 +1,40 @@
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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long
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mtime ( const char *file )
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{
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struct stat st;
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if ( stat( file, &st ) )
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return 0;
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return st.st_mtime;
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}
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/** returns /true/ if /file1/ is newer than /file2/ (or file2 doesn't exist) */
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bool
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newer ( const char *file1, const char *file2 )
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{
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return mtime( file1 ) > mtime( file2 );
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}
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@ -0,0 +1,21 @@
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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long mtime ( const char *file );
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bool newer ( const char *file1, const char *file2 );
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