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gnode.h
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gnode.h
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#ifndef GNODE_H
#define GNODE_H
/* $OpenBSD: gnode.h,v 1.39 2020/01/26 12:41:21 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/time.h>
#ifndef LIST_TYPE
#include "lst_t.h"
#endif
#ifndef LOCATION_TYPE
#include "location.h"
#endif
#ifndef SYMTABLE_H
#include "symtable.h"
#endif
#include <assert.h>
/*-
* The structure for an individual graph node. Each node has a lot of
* of data associated with it.
* 1) the *name*of the target it describes (at end because ohash)
* 2) the *path* to the target file
* 3) the *type* of operator used to define its sources
* (cf parse.c, mostly : :: ! but...)
* 4) *must_make*: whether it is involved in this invocation of make
* 5) *built_status*: has the target been rebuilt/is up-to-date...
* 6) *child_rebuild*: at least one of its children has been rebuilt
* 7) *children_left*: number of children still to consider
* 8) *mtime*: node's modification time
* 9) *youngest*: youngest child (cf make.c)
* 10) *parents*: list of nodes for which this is a dependency
* 11) *children*: list of nodes on which this depends
* 12) *cohorts*: list of nodes of the same name created by the :: operator
* 13) *predecessors*: list of nodes, result of .ORDER:
* if considered for building, they should be built before this node.
* 14) *successors*: list of nodes, result of .ORDER:
* if considered for building, they should be built after this node.
* 15) *localvars*: ``local'' variables specific to this target
* and this target only (cf var.c [$@ $< $?, etc.])
* 16) *commands*: the actual LIST of strings to pass to the shell
* to create this target.
*/
/* constants for specials
* Most of these values are only handled by parse.c.
* In many cases, there is a corresponding OP_* flag
*/
#define SPECIAL_NONE 0U
#define SPECIAL_PATH 62U /* handled by parse.c and suff.c */
#define SPECIAL_EXEC 4U
#define SPECIAL_IGNORE 5U
#define SPECIAL_NOTHING 6U /* this is used for things we
* recognize for compatibility but
* don't do anything with... */
#define SPECIAL_DEPRECATED 7U /* this is an old keyword and it will
* trigger a fatal error. */
#define SPECIAL_INVISIBLE 8U
#define SPECIAL_JOIN 9U
#define SPECIAL_MADE 11U
#define SPECIAL_MAIN 12U
#define SPECIAL_MAKE 13U
#define SPECIAL_MFLAGS 14U
#define SPECIAL_NOTMAIN 15U
#define SPECIAL_NOTPARALLEL 16U
#define SPECIAL_OPTIONAL 18U
#define SPECIAL_ORDER 19U
#define SPECIAL_PARALLEL 20U
#define SPECIAL_PHONY 22U
#define SPECIAL_PRECIOUS 23U
#define SPECIAL_SILENT 25U
#define SPECIAL_SUFFIXES 27U
#define SPECIAL_USE 28U
#define SPECIAL_WAIT 29U
#define SPECIAL_NOPATH 30U
#define SPECIAL_ERROR 31U
#define SPECIAL_CHEAP 32U
#define SPECIAL_EXPENSIVE 33U
struct GNode_ {
unsigned int type; /* node type (see the OP flags, below) */
unsigned int special_op; /* special op to apply (only used in parse.c) */
unsigned char special; /* type of special node or SPECIAL_NONE */
bool must_make; /* true if this target needs building */
bool child_rebuilt; /* true if at least one child was rebuilt,
* thus triggering timestamps changes */
char built_status;
#define UNKNOWN 0 /* Not examined yet */
#define BUILDING 1 /* In the process of building */
#define REBUILT 2 /* Was out of date and got rebuilt */
#define UPTODATE 3 /* Was already up-to-date */
#define ERROR 4 /* Error occurred while building
* (used only in compat mode) */
#define ABORTED 5 /* Was aborted due to an error
* making an inferior */
#define NOSUCHNODE 6 /* error from run_gnode */
#define HELDBACK 7 /* Another target in the same group is
* currently building, avoid race conditions
* Only used in the parallel engine make.c */
char *path; /* full pathname of the file */
int order; /* wait weight (see .ORDER/predecessors/successors) */
int children_left; /* number of children left to build */
struct timespec mtime; /* Node's modification time */
GNode *youngest; /* Node's youngest child */
GNode *impliedsrc; /* found by suff, to help with localvars */
LIST cohorts; /* Other nodes for the :: operator */
LIST parents; /* Nodes that depend on this one */
LIST children; /* Nodes on which this one depends */
LIST predecessors;
LIST successors;
SymTable localvars;
LIST commands; /* Creation commands */
Suff *suffix; /* Suffix for the node (determined by
* Suff_FindDeps and opaque to everyone
* but the Suff module) */
GNode *groupling; /* target lists, for HELDBACK: do not build two
* at the same time */
GNode *watched; /* the node currently building for HELDBACK */
/* stuff for target name equivalence: */
GNode *sibling; /* equivalent targets (not complete yet) */
char *basename; /* pointer to name stripped of path */
GNode *next;
bool in_cycle; /* cycle detection */
char name[1]; /* The target's name */
};
struct command
{
Location location;
char string[1];
};
#define has_been_built(gn) \
((gn)->built_status == REBUILT || (gn)->built_status == UPTODATE)
#define should_have_file(gn) \
((gn)->special == SPECIAL_NONE && \
((gn)->type & (OP_PHONY | OP_DUMMY)) == 0)
/*
* The OP_ constants are used when parsing a dependency line as a way of
* communicating to other parts of the program the way in which a target
* should be made. These constants are bitwise-OR'ed together and
* placed in the 'type' field of each node. Any node that has
* a 'type' field which satisfies the OP_NOP function was never never on
* the lefthand side of an operator, though it may have been on the
* righthand side...
*/
#define OP_ZERO 0x00000000 /* No dependency operator seen so far */
#define OP_DEPENDS 0x00000001 /* Execution of commands depends on
* kids (:) */
#define OP_FORCE 0x00000002 /* Always execute commands (!) */
#define OP_DOUBLEDEP 0x00000004 /* Execution of commands depends on kids
* per line (::) */
#define OP_ERROR 0x00000007
#define OP_OPMASK (OP_DEPENDS|OP_FORCE|OP_DOUBLEDEP)
#define OP_OPTIONAL 0x00000008 /* Don't care if the target doesn't
* exist and can't be created */
#define OP_USE 0x00000010 /* Use associated commands for parents */
#define OP_IGNORE 0x00000040 /* Ignore errors when creating the node */
#define OP_PRECIOUS 0x00000080 /* Don't remove the target when
* interrupted */
#define OP_SILENT 0x00000100 /* Don't echo commands when executed */
#define OP_MAKE 0x00000200 /* Target is a recursive make so its
* commands should always be executed when
* it is out of date, regardless of the
* state of the -n or -t flags */
#define OP_INVISIBLE 0x00001000 /* The node is invisible to its parents.
* I.e. it doesn't show up in the parents's
* local variables. Used by :: for
* supplementary nodes (cohorts). */
#define OP_NOTMAIN 0x00002000 /* The node is exempt from normal 'main
* target' processing in parse.c */
#define OP_PHONY 0x00004000 /* Not a file target; run always */
#define OP_NOPATH 0x00008000 /* Don't search for file in the path */
#define OP_NODEFAULT 0x00010000 /* Special node that never needs */
/* DEFAULT commands applied */
#define OP_DUMMY 0x00020000 /* node was created by default, but it */
/* does not really exist. */
/* Attributes applied by PMake */
#define OP_TRANSFORM 0x00040000 /* The node is a transformation rule */
#define OP_MEMBER 0x00080000 /* Target is a member of an archive */
#define OP_DOUBLE 0x00100000 /* normal op with double commands */
#define OP_ARCHV 0x00200000 /* Target is an archive construct */
#define OP_HAS_COMMANDS 0x00400000 /* Target has all the commands it should.
* Used when parsing to catch multiple
* commands for a target */
#define OP_DEPS_FOUND 0x00800000 /* Already processed by Suff_FindDeps */
#define OP_RESOLVED 0x01000000 /* We looked harder already */
#define OP_CHEAP 0x02000000 /* Assume job is not recursive */
#define OP_EXPENSIVE 0x04000000 /* Recursive job, don't run in parallel */
/*
* OP_NOP will return true if the node with the given type was not the
* object of a dependency operator
*/
#define OP_NOP(t) (((t) & OP_OPMASK) == OP_ZERO)
#define OP_NOTARGET (OP_NOTMAIN|OP_USE|OP_TRANSFORM)
#endif