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Diffstat (limited to 'jam-files/engine/rules.h')
| -rw-r--r-- | jam-files/engine/rules.h | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/jam-files/engine/rules.h b/jam-files/engine/rules.h new file mode 100644 index 00000000..806a1469 --- /dev/null +++ b/jam-files/engine/rules.h @@ -0,0 +1,280 @@ +/* + * Copyright 1993, 1995 Christopher Seiwald. + * + * This file is part of Jam - see jam.c for Copyright information. + */ + +/* This file is ALSO: + * Copyright 2001-2004 David Abrahams. + * Distributed under the Boost Software License, Version 1.0. + * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) + */ + +#ifndef RULES_DWA_20011020_H +#define RULES_DWA_20011020_H + +#include "modules.h" +#include "jam.h" +#include "parse.h" + + +/* + * rules.h - targets, rules, and related information + * + * This file describes the structures holding the targets, rules, and + * related information accumulated by interpreting the statements + * of the jam files. + * + * The following are defined: + * + * RULE - a generic jam rule, the product of RULE and ACTIONS. + * ACTIONS - a chain of ACTIONs. + * ACTION - a RULE instance with targets and sources. + * SETTINGS - variables to set when executing a TARGET's ACTIONS. + * TARGETS - a chain of TARGETs. + * TARGET - an entity (e.g. a file) that can be built. + * + * 04/11/94 (seiwald) - Combined deps & headers into deps[2] in TARGET. + * 04/12/94 (seiwald) - actionlist() now just appends a single action. + * 06/01/94 (seiwald) - new 'actions existing' does existing sources + * 12/20/94 (seiwald) - NOTIME renamed NOTFILE. + * 01/19/95 (seiwald) - split DONTKNOW into CANTFIND/CANTMAKE. + * 02/02/95 (seiwald) - new LEAVES modifier on targets. + * 02/14/95 (seiwald) - new NOUPDATE modifier on targets. + */ + +typedef struct _rule RULE; +typedef struct _target TARGET; +typedef struct _targets TARGETS; +typedef struct _action ACTION; +typedef struct _actions ACTIONS; +typedef struct _settings SETTINGS ; + +/* RULE - a generic jam rule, the product of RULE and ACTIONS. */ + +/* A rule's argument list. */ +struct argument_list +{ + int reference_count; + LOL data[1]; +}; + +/* Build actions corresponding to a rule. */ +struct rule_actions +{ + int reference_count; + char * command; /* command string from ACTIONS */ + LIST * bindlist; + int flags; /* modifiers on ACTIONS */ + +#define RULE_NEWSRCS 0x01 /* $(>) is updated sources only */ +#define RULE_TOGETHER 0x02 /* combine actions on single target */ +#define RULE_IGNORE 0x04 /* ignore return status of executes */ +#define RULE_QUIETLY 0x08 /* do not mention it unless verbose */ +#define RULE_PIECEMEAL 0x10 /* split exec so each $(>) is small */ +#define RULE_EXISTING 0x20 /* $(>) is pre-exisitng sources only */ +}; + +typedef struct rule_actions rule_actions; +typedef struct argument_list argument_list; + +struct _rule +{ + char * name; + PARSE * procedure; /* parse tree from RULE */ + argument_list * arguments; /* argument checking info, or NULL for unchecked + */ + rule_actions * actions; /* build actions, or NULL for no actions */ + module_t * module; /* module in which this rule is executed */ + int exported; /* nonzero if this rule is supposed to appear in + * the global module and be automatically + * imported into other modules + */ +#ifdef HAVE_PYTHON + PyObject * python_function; +#endif +}; + +/* ACTIONS - a chain of ACTIONs. */ +struct _actions +{ + ACTIONS * next; + ACTIONS * tail; /* valid only for head */ + ACTION * action; +}; + +/* ACTION - a RULE instance with targets and sources. */ +struct _action +{ + RULE * rule; + TARGETS * targets; + TARGETS * sources; /* aka $(>) */ + char running; /* has been started */ + char status; /* see TARGET status */ +}; + +/* SETTINGS - variables to set when executing a TARGET's ACTIONS. */ +struct _settings +{ + SETTINGS * next; + char * symbol; /* symbol name for var_set() */ + LIST * value; /* symbol value for var_set() */ + int multiple; +}; + +/* TARGETS - a chain of TARGETs. */ +struct _targets +{ + TARGETS * next; + TARGETS * tail; /* valid only for head */ + TARGET * target; +}; + +/* TARGET - an entity (e.g. a file) that can be built. */ +struct _target +{ + char * name; + char * boundname; /* if search() relocates target */ + ACTIONS * actions; /* rules to execute, if any */ + SETTINGS * settings; /* variables to define */ + + short flags; /* status info */ + +#define T_FLAG_TEMP 0x0001 /* TEMPORARY applied */ +#define T_FLAG_NOCARE 0x0002 /* NOCARE applied */ +#define T_FLAG_NOTFILE 0x0004 /* NOTFILE applied */ +#define T_FLAG_TOUCHED 0x0008 /* ALWAYS applied or -t target */ +#define T_FLAG_LEAVES 0x0010 /* LEAVES applied */ +#define T_FLAG_NOUPDATE 0x0020 /* NOUPDATE applied */ +#define T_FLAG_VISITED 0x0040 /* CWM: Used in debugging */ + +/* This flag has been added to support a new built-in rule named "RMBAD". It is + * used to force removal of outdated targets whose dependencies fail to build. + */ +#define T_FLAG_RMOLD 0x0080 /* RMBAD applied */ + +/* This flag was added to support a new built-in rule named "FAIL_EXPECTED" used + * to indicate that the result of running a given action should be inverted, + * i.e. ok <=> fail. This is useful for launching certain test runs from a + * Jamfile. + */ +#define T_FLAG_FAIL_EXPECTED 0x0100 /* FAIL_EXPECTED applied */ + +#define T_FLAG_INTERNAL 0x0200 /* internal INCLUDES node */ + +/* Indicates that the target must be a file. This prevents matching non-files, + * like directories, when a target is searched. + */ +#define T_FLAG_ISFILE 0x0400 + +#define T_FLAG_PRECIOUS 0x0800 + + char binding; /* how target relates to a real file or + * folder + */ + +#define T_BIND_UNBOUND 0 /* a disembodied name */ +#define T_BIND_MISSING 1 /* could not find real file */ +#define T_BIND_PARENTS 2 /* using parent's timestamp */ +#define T_BIND_EXISTS 3 /* real file, timestamp valid */ + + TARGETS * depends; /* dependencies */ + TARGETS * dependants; /* the inverse of dependencies */ + TARGETS * rebuilds; /* targets that should be force-rebuilt + * whenever this one is + */ + TARGET * includes; /* internal includes node */ + TARGET * original_target; /* original_target->includes = this */ + char rescanned; + + time_t time; /* update time */ + time_t leaf; /* update time of leaf sources */ + + char fate; /* make0()'s diagnosis */ + +#define T_FATE_INIT 0 /* nothing done to target */ +#define T_FATE_MAKING 1 /* make0(target) on stack */ + +#define T_FATE_STABLE 2 /* target did not need updating */ +#define T_FATE_NEWER 3 /* target newer than parent */ + +#define T_FATE_SPOIL 4 /* >= SPOIL rebuilds parents */ +#define T_FATE_ISTMP 4 /* unneeded temp target oddly present */ + +#define T_FATE_BUILD 5 /* >= BUILD rebuilds target */ +#define T_FATE_TOUCHED 5 /* manually touched with -t */ +#define T_FATE_REBUILD 6 +#define T_FATE_MISSING 7 /* is missing, needs updating */ +#define T_FATE_NEEDTMP 8 /* missing temp that must be rebuild */ +#define T_FATE_OUTDATED 9 /* is out of date, needs updating */ +#define T_FATE_UPDATE 10 /* deps updated, needs updating */ + +#define T_FATE_BROKEN 11 /* >= BROKEN ruins parents */ +#define T_FATE_CANTFIND 11 /* no rules to make missing target */ +#define T_FATE_CANTMAKE 12 /* can not find dependencies */ + + char progress; /* tracks make1() progress */ + +#define T_MAKE_INIT 0 /* make1(target) not yet called */ +#define T_MAKE_ONSTACK 1 /* make1(target) on stack */ +#define T_MAKE_ACTIVE 2 /* make1(target) in make1b() */ +#define T_MAKE_RUNNING 3 /* make1(target) running commands */ +#define T_MAKE_DONE 4 /* make1(target) done */ + +#ifdef OPT_SEMAPHORE + #define T_MAKE_SEMAPHORE 5 /* Special target type for semaphores */ +#endif + +#ifdef OPT_SEMAPHORE + TARGET * semaphore; /* used in serialization */ +#endif + + char status; /* exec_cmd() result */ + + int asynccnt; /* child deps outstanding */ + TARGETS * parents; /* used by make1() for completion */ + char * cmds; /* type-punned command list */ + + char * failed; +}; + + +/* Action related functions. */ +ACTIONS * actionlist ( ACTIONS *, ACTION * ); +void freeactions ( ACTIONS * ); +SETTINGS * addsettings ( SETTINGS *, int flag, char * symbol, LIST * value ); +void pushsettings ( SETTINGS * ); +void popsettings ( SETTINGS * ); +SETTINGS * copysettings ( SETTINGS * ); +void freesettings ( SETTINGS * ); +void actions_refer( rule_actions * ); +void actions_free ( rule_actions * ); + +/* Argument list related functions. */ +void args_free ( argument_list * ); +argument_list * args_new (); +void args_refer( argument_list * ); + +/* Rule related functions. */ +RULE * bindrule ( char * rulename, module_t * ); +RULE * import_rule ( RULE * source, module_t *, char * name ); +RULE * new_rule_body ( module_t *, char * rulename, argument_list *, PARSE * procedure, int exprt ); +RULE * new_rule_actions( module_t *, char * rulename, char * command, LIST * bindlist, int flags ); +void rule_free ( RULE * ); + +/* Target related functions. */ +void bind_explicitly_located_targets(); +TARGET * bindtarget ( char const * target_name ); +TARGET * copytarget ( TARGET const * t ); +void freetargets ( TARGETS * ); +TARGET * search_for_target ( char * name, LIST * search_path ); +TARGETS * targetchain ( TARGETS * chain, TARGETS * ); +TARGETS * targetentry ( TARGETS * chain, TARGET * ); +void target_include ( TARGET * including, TARGET * included ); +TARGETS * targetlist ( TARGETS * chain, LIST * target_names ); +void touch_target ( char * t ); + +/* Final module cleanup. */ +void rules_done(); + +#endif |