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[src/trunk]: src/usr.bin/make make(1): restructure GNode types and documentation
details: https://anonhg.NetBSD.org/src/rev/af50ee070722
branches: trunk
changeset: 975161:af50ee070722
user: rillig <rillig%NetBSD.org@localhost>
date: Sat Aug 22 18:20:31 2020 +0000
description:
make(1): restructure GNode types and documentation
Having a numbered list above the type was not helpful since the numbers
didn't serve any purpose, they just consumed screen space.
Several of these list items didn't have an obvious relationship to the
struct fields. It's better to have just a rough introduction as the
type level documentation, leaving the details to the individual fields.
Converting the types and flags and other constants into separate types
and defining them outside the struct leaves more space to see the
relationship of the struct fields.
Limiting the documentation of each field to a single line, as suggested
by the end-of-line comments, reduces clarity since several of the fields
need way more documentation to be properly understood.
diffstat:
usr.bin/make/make.h | 182 ++++++++++++++++++++++++++-------------------------
usr.bin/make/targ.c | 8 +-
2 files changed, 97 insertions(+), 93 deletions(-)
diffs (238 lines):
diff -r 140ce5dbea6a -r af50ee070722 usr.bin/make/make.h
--- a/usr.bin/make/make.h Sat Aug 22 17:34:25 2020 +0000
+++ b/usr.bin/make/make.h Sat Aug 22 18:20:31 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: make.h,v 1.118 2020/08/20 17:13:05 rillig Exp $ */
+/* $NetBSD: make.h,v 1.119 2020/08/22 18:20:31 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -134,101 +134,105 @@
#include "buf.h"
#include "make_malloc.h"
-/*-
- * The structure for an individual graph node. Each node has several
- * pieces of data associated with it.
- * 1) the name of the target it describes
- * 2) the location of the target file in the file system.
- * 3) the type of operator used to define its sources (qv. parse.c)
- * 4) whether it is involved in this invocation of make
- * 5) whether the target has been remade
- * 6) whether any of its children has been remade
- * 7) the number of its children that are, as yet, unmade
- * 8) its modification time
- * 9) the modification time of its youngest child (qv. make.c)
- * 10) a list of nodes for which this is a source (parents)
- * 11) a list of nodes on which this depends (children)
- * 12) a list of nodes that depend on this, as gleaned from the
- * transformation rules (iParents)
- * 13) a list of ancestor nodes, which includes parents, iParents,
- * and recursive parents of parents
- * 14) a list of nodes of the same name created by the :: operator
- * 15) a list of nodes that must be made (if they're made) before
- * this node can be, but that do not enter into the datedness of
- * this node.
- * 16) a list of nodes that must be made (if they're made) before
- * this node or any child of this node can be, but that do not
- * enter into the datedness of this node.
- * 17) a list of nodes that must be made (if they're made) after
- * this node is, but that do not depend on this node, in the
- * normal sense.
- * 18) a Lst of ``local'' variables that are specific to this target
- * and this target only (qv. var.c [$@ $< $?, etc.])
- * 19) a Lst of strings that are commands to be given to a shell
- * to create this target.
- */
+typedef enum {
+ UNMADE, /* Not examined yet */
+ DEFERRED, /* Examined once (building child) */
+ REQUESTED, /* on toBeMade list */
+ BEINGMADE, /* Target is already being made.
+ * Indicates a cycle in the graph. */
+ MADE, /* Was out-of-date and has been made */
+ UPTODATE, /* Was already up-to-date */
+ ERROR, /* An error occurred while it was being
+ * made (used only in compat mode) */
+ ABORTED /* The target was aborted due to an error
+ * making an inferior (compat). */
+} GNodeMade;
+
+typedef enum {
+ REMAKE = 0x0001, /* this target needs to be (re)made */
+ CHILDMADE = 0x0002, /* children of this target were made */
+ FORCE = 0x0004, /* children don't exist, and we pretend made */
+ DONE_WAIT = 0x0008, /* Set by Make_ProcessWait() */
+ DONE_ORDER = 0x0010, /* Build requested by .ORDER processing */
+ FROM_DEPEND = 0x0020, /* Node created from .depend */
+ DONE_ALLSRC = 0x0040, /* We do it once only */
+ CYCLE = 0x1000, /* Used by MakePrintStatus */
+ DONECYCLE = 0x2000, /* Used by MakePrintStatus */
+ INTERNAL = 0x4000 /* Internal use only */
+} GNodeFlags;
+
+/* A graph node represents a target that can possibly be made, including its
+ * relation to other targets and a lot of other details. */
typedef struct GNode {
- char *name; /* The target's name */
- char *uname; /* The unexpanded name of a .USE node */
- char *path; /* The full pathname of the file */
- int type; /* Its type (see the OP flags, below) */
+ /* The target's name, such as "clean" or "make.c" */
+ char *name;
+ /* The unexpanded name of a .USE node */
+ char *uname;
+ /* The full pathname of the file belonging to the target.
+ * XXX: What about .PHONY targets? These don't have an associated path. */
+ char *path;
+
+ /* The type of operator used to define the sources (see the OP flags below).
+ * XXX: This looks like a wild mixture of type and flags. */
+ int type;
+ /* whether it is involved in this invocation of make */
+ GNodeFlags flags;
+
+ /* The state of processing on this node */
+ GNodeMade made;
+ int unmade; /* The number of unmade children */
- int flags;
-#define REMAKE 0x1 /* this target needs to be (re)made */
-#define CHILDMADE 0x2 /* children of this target were made */
-#define FORCE 0x4 /* children don't exist, and we pretend made */
-#define DONE_WAIT 0x8 /* Set by Make_ProcessWait() */
-#define DONE_ORDER 0x10 /* Build requested by .ORDER processing */
-#define FROM_DEPEND 0x20 /* Node created from .depend */
-#define DONE_ALLSRC 0x40 /* We do it once only */
-#define CYCLE 0x1000 /* Used by MakePrintStatus */
-#define DONECYCLE 0x2000 /* Used by MakePrintStatus */
-#define INTERNAL 0x4000 /* Internal use only */
- enum enum_made {
- UNMADE, DEFERRED, REQUESTED, BEINGMADE,
- MADE, UPTODATE, ERROR, ABORTED
- } made; /* Set to reflect the state of processing
- * on this node:
- * UNMADE - Not examined yet
- * DEFERRED - Examined once (building child)
- * REQUESTED - on toBeMade list
- * BEINGMADE - Target is already being made.
- * Indicates a cycle in the graph.
- * MADE - Was out-of-date and has been made
- * UPTODATE - Was already up-to-date
- * ERROR - An error occurred while it was being
- * made (used only in compat mode)
- * ABORTED - The target was aborted due to
- * an error making an inferior (compat).
- */
- int unmade; /* The number of unmade children */
+ time_t mtime; /* Its modification time */
+ struct GNode *cmgn; /* The youngest child */
+
+ /* Links to parents for which this is an implied source. May be empty.
+ * Nodes that depend on this, as gleaned from the transformation rules. */
+ Lst iParents;
+
+ /* Other nodes of the same name for the :: operator. */
+ Lst cohorts;
+
+ /* The nodes that depend on this one, or in other words, the nodes for
+ * which this is a source. */
+ Lst parents;
+ /* The nodes on which this one depends. */
+ Lst children;
+
+ /* .ORDER nodes we need made. The nodes that must be made (if they're
+ * made) before this node can be made, but that do not enter into the
+ * datedness of this node. */
+ Lst order_pred;
+ /* .ORDER nodes who need us. The nodes that must be made (if they're made
+ * at all) after this node is made, but that do not depend on this node,
+ * in the normal sense. */
+ Lst order_succ;
- time_t mtime; /* Its modification time */
- struct GNode *cmgn; /* The youngest child */
+ /* #n for this cohort */
+ char cohort_num[8];
+ /* The number of unmade instances on the cohorts list */
+ int unmade_cohorts;
+ /* Pointer to the first instance of a :: node; only set when on a cohorts
+ * list */
+ struct GNode *centurion;
- Lst iParents; /* Links to parents for which this is an
- * implied source, if any */
- Lst cohorts; /* Other nodes for the :: operator */
- Lst parents; /* Nodes that depend on this one */
- Lst children; /* Nodes on which this one depends */
- Lst order_pred; /* .ORDER nodes we need made */
- Lst order_succ; /* .ORDER nodes who need us */
+ /* Last time we tried to make this node */
+ unsigned int checked; /* XXX: year 2038 */
- char cohort_num[8]; /* #n for this cohort */
- int unmade_cohorts;/* # of unmade instances on the
- cohorts list */
- struct GNode *centurion; /* Pointer to the first instance of a ::
- node; only set when on a cohorts list */
- unsigned int checked; /* Last time we tried to makle this node */
+ /* The "local" variables that are specific to this target and this target
+ * only, such as $@, $<, $?. */
+ Hash_Table context;
+
+ /* The commands to be given to a shell to create this target. */
+ Lst commands;
- Hash_Table context; /* The local variables */
- Lst commands; /* Creation commands */
+ /* Suffix for the node (determined by Suff_FindDeps and opaque to everyone
+ * but the Suff module) */
+ struct Suff *suffix;
- struct Suff *suffix; /* Suffix for the node (determined by
- * Suff_FindDeps and opaque to everyone
- * but the Suff module) */
- const char *fname; /* filename where the GNode got defined */
- int lineno; /* line number where the GNode got defined */
+ /* filename where the GNode got defined */
+ const char *fname;
+ /* line number where the GNode got defined */
+ int lineno;
} GNode;
/*
diff -r 140ce5dbea6a -r af50ee070722 usr.bin/make/targ.c
--- a/usr.bin/make/targ.c Sat Aug 22 17:34:25 2020 +0000
+++ b/usr.bin/make/targ.c Sat Aug 22 18:20:31 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: targ.c,v 1.70 2020/08/22 15:17:09 rillig Exp $ */
+/* $NetBSD: targ.c,v 1.71 2020/08/22 18:20:31 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
*/
#ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: targ.c,v 1.70 2020/08/22 15:17:09 rillig Exp $";
+static char rcsid[] = "$NetBSD: targ.c,v 1.71 2020/08/22 18:20:31 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)targ.c 8.2 (Berkeley) 3/19/94";
#else
-__RCSID("$NetBSD: targ.c,v 1.70 2020/08/22 15:17:09 rillig Exp $");
+__RCSID("$NetBSD: targ.c,v 1.71 2020/08/22 18:20:31 rillig Exp $");
#endif
#endif /* not lint */
#endif
@@ -605,7 +605,7 @@
}
static const char *
-made_name(enum enum_made made)
+made_name(GNodeMade made)
{
switch (made) {
case UNMADE: return "unmade";
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