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ec50fe2a2b
* Installed Tim Magill's "graph pruning" performance enhancement. * Update version to 3.77.90 for the release. * Require automake 1.4.
195 lines
8.5 KiB
C
195 lines
8.5 KiB
C
/* Definition of target file data structures for GNU Make.
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Copyright (C) 1988,89,90,91,92,93,94,97 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Make is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Make; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Structure that represents the info on one file
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that the makefile says how to make.
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All of these are chained together through `next'. */
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struct file
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{
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struct file *next;
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char *name;
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char *hname; /* Hashed filename */
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char *vpath; /* VPATH/vpath pathname */
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struct dep *deps;
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struct commands *cmds; /* Commands to execute for this target. */
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int command_flags; /* Flags OR'd in for cmds; see commands.h. */
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char *stem; /* Implicit stem, if an implicit
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rule has been used */
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struct dep *also_make; /* Targets that are made by making this. */
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FILE_TIMESTAMP last_mtime; /* File's modtime, if already known. */
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FILE_TIMESTAMP mtime_before_update; /* File's modtime before any updating
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has been performed. */
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struct file *prev; /* Previous entry for same file name;
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used when there are multiple double-colon
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entries for the same file. */
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/* File that this file was renamed to. After any time that a
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file could be renamed, call `check_renamed' (below). */
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struct file *renamed;
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/* List of variable sets used for this file. */
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struct variable_set_list *variables;
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/* Immediate dependent that caused this target to be remade,
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or nil if there isn't one. */
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struct file *parent;
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/* For a double-colon entry, this is the first double-colon entry for
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the same file. Otherwise this is null. */
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struct file *double_colon;
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/* Pattern-specific variable reference for this target, or null if there
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isn't one. Also see the pat_searched flag, below. */
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struct pattern_var *patvar;
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short int update_status; /* Status of the last attempt to update,
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or -1 if none has been made. */
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enum /* State of the commands. */
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{ /* Note: It is important that cs_not_started be zero. */
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cs_not_started, /* Not yet started. */
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cs_deps_running, /* Dep commands running. */
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cs_running, /* Commands running. */
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cs_finished /* Commands finished. */
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} command_state ENUM_BITFIELD (2);
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unsigned int precious:1; /* Non-0 means don't delete file on quit */
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unsigned int tried_implicit:1; /* Nonzero if have searched
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for implicit rule for making
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this file; don't search again. */
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unsigned int updating:1; /* Nonzero while updating deps of this file */
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unsigned int updated:1; /* Nonzero if this file has been remade. */
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unsigned int is_target:1; /* Nonzero if file is described as target. */
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unsigned int cmd_target:1; /* Nonzero if file was given on cmd line. */
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unsigned int phony:1; /* Nonzero if this is a phony file
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i.e., a dependency of .PHONY. */
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unsigned int intermediate:1;/* Nonzero if this is an intermediate file. */
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/* Nonzero, for an intermediate file,
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means remove_intermediates should not delete it. */
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unsigned int secondary:1;
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unsigned int dontcare:1; /* Nonzero if no complaint is to be made if
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this target cannot be remade. */
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unsigned int mfile_status:1;/* Nonzero if update_status was obtained
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while remaking a makefile. */
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unsigned int ignore_vpath:1;/* Nonzero if we threw out VPATH name. */
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unsigned int pat_searched:1;/* Nonzero if we already searched for
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pattern-specific variables. */
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unsigned int considered:1; /* equal to `considered' if file has been
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considered on current scan of goal chain */
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};
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/* Number of intermediate files entered. */
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extern unsigned int num_intermediates;
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/* Current value for pruning the scan of the goal chain (toggle 0/1). */
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extern unsigned int considered;
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extern struct file *default_goal_file, *suffix_file, *default_file;
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extern struct file *lookup_file PARAMS ((char *name));
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extern struct file *enter_file PARAMS ((char *name));
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extern void remove_intermediates PARAMS ((int sig));
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extern void snap_deps PARAMS ((void));
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extern void rename_file PARAMS ((struct file *file, char *name));
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extern void rehash_file PARAMS ((struct file *file, char *name));
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extern void file_hash_enter PARAMS ((struct file *file, char *name,
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unsigned int oldhash, char *oldname));
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extern void set_command_state PARAMS ((struct file *file, int state));
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extern void notice_finished_file PARAMS ((struct file *file));
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#if ST_MTIM_NSEC
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# define FILE_TIMESTAMP_STAT_MODTIME(st) \
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FILE_TIMESTAMP_FROM_S_AND_NS ((st).st_mtim.tv_sec, \
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(st).st_mtim.ST_MTIM_NSEC)
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# define FILE_TIMESTAMPS_PER_S \
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MIN ((FILE_TIMESTAMP) 1000000000, \
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(INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \
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/ INTEGER_TYPE_MAXIMUM (time_t)))
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#else
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# define FILE_TIMESTAMP_STAT_MODTIME(st) ((st).st_mtime)
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# define FILE_TIMESTAMPS_PER_S 1
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#endif
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#define FILE_TIMESTAMP_FROM_S_AND_NS(s, ns) \
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((s) * FILE_TIMESTAMPS_PER_S \
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+ (ns) * FILE_TIMESTAMPS_PER_S / 1000000000)
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#define FILE_TIMESTAMP_DIV(a, b) ((a)/(b) - ((a)%(b) < 0))
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#define FILE_TIMESTAMP_MOD(a, b) ((a)%(b) + ((a)%(b) < 0) * (b))
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#define FILE_TIMESTAMP_S(ts) FILE_TIMESTAMP_DIV ((ts), FILE_TIMESTAMPS_PER_S)
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#define FILE_TIMESTAMP_NS(ts) \
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(((FILE_TIMESTAMP_MOD ((ts), FILE_TIMESTAMPS_PER_S) * 1000000000) \
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+ (FILE_TIMESTAMPS_PER_S - 1)) \
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/ FILE_TIMESTAMPS_PER_S)
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/* Upper bound on length of string "YYYY-MM-DD HH:MM:SS.NNNNNNNNN"
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representing a file timestamp. The upper bound is not necessarily 19,
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since the year might be less than -999 or greater than 9999.
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Subtract one for the sign bit if in case file timestamps can be negative;
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subtract FLOOR_LOG2_SECONDS_PER_YEAR to yield an upper bound on how many
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file timestamp bits might affect the year;
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302 / 1000 is log10 (2) rounded up;
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add one for integer division truncation;
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add one more for a minus sign if file timestamps can be negative;
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add 4 to allow for any 4-digit epoch year (e.g. 1970);
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add 25 to allow for "-MM-DD HH:MM:SS.NNNNNNNNN". */
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#define FLOOR_LOG2_SECONDS_PER_YEAR 24
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#define FILE_TIMESTAMP_PRINT_LEN_BOUND \
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(((sizeof (FILE_TIMESTAMP) * CHAR_BIT - 1 - FLOOR_LOG2_SECONDS_PER_YEAR) \
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* 302 / 1000) \
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+ 1 + 1 + 4 + 25)
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extern FILE_TIMESTAMP file_timestamp_now PARAMS ((void));
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extern void file_timestamp_sprintf PARAMS ((char *p, FILE_TIMESTAMP ts));
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/* Return the mtime of file F (a struct file *), caching it.
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The value is -1 if the file does not exist. */
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#define file_mtime(f) file_mtime_1 ((f), 1)
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/* Return the mtime of file F (a struct file *), caching it.
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Don't search using vpath for the file--if it doesn't actually exist,
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we don't find it.
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The value is -1 if the file does not exist. */
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#define file_mtime_no_search(f) file_mtime_1 ((f), 0)
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extern FILE_TIMESTAMP f_mtime PARAMS ((struct file *file, int search));
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#define file_mtime_1(f, v) \
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((f)->last_mtime ? (f)->last_mtime : f_mtime ((f), v))
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/* Modtime value to use for `infinitely new'. We used to get the current time
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from the system and use that whenever we wanted `new'. But that causes
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trouble when the machine running make and the machine holding a file have
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different ideas about what time it is; and can also lose for `force'
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targets, which need to be considered newer than anything that depends on
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them, even if said dependents' modtimes are in the future.
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If FILE_TIMESTAMP is unsigned, its maximum value is the same as
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((FILE_TIMESTAMP) -1), so use one less than that, because -1 is
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used for non-existing files. */
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#define NEW_MTIME \
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(INTEGER_TYPE_SIGNED (FILE_TIMESTAMP) \
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? INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \
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: (INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) - 1))
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#define check_renamed(file) \
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while ((file)->renamed != 0) (file) = (file)->renamed /* No ; here. */
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