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1 | /* |
2 | * Copyright 1994 Christopher Seiwald. | |
3 | * | |
4 | * This file is part of Jam - see jam.c for Copyright information. | |
5 | */ | |
6 | ||
7 | /* | |
8 | * command.h - the CMD structure and routines to manipulate them | |
9 | * | |
10 | * Both ACTION and CMD contain a rule, targets, and sources. An | |
11 | * ACTION describes a rule to be applied to the given targets and | |
12 | * sources; a CMD is what actually gets executed by the shell. The | |
13 | * differences are due to: | |
14 | * | |
15 | * ACTIONS must be combined if 'actions together' is given. | |
16 | * ACTIONS must be split if 'actions piecemeal' is given. | |
17 | * ACTIONS must have current sources omitted for 'actions updated'. | |
18 | * | |
19 | * The CMD datatype holds a single command that is to be executed | |
20 | * against a target, and they can chain together to represent the | |
21 | * full collection of commands used to update a target. | |
22 | * | |
23 | * Structures: | |
24 | * | |
25 | * CMD - an action, ready to be formatted into a buffer and executed. | |
26 | * | |
27 | * External routines: | |
28 | * | |
29 | * cmd_new() - return a new CMD or 0 if too many args. | |
30 | * cmd_free() - delete CMD and its parts. | |
31 | * cmd_next() - walk the CMD chain. | |
32 | * cmd_release_targets_and_shell() - CMD forgets about its targets & shell. | |
33 | */ | |
34 | ||
35 | ||
36 | /* | |
37 | * CMD - an action, ready to be formatted into a buffer and executed. | |
38 | */ | |
39 | ||
40 | #ifndef COMMAND_SW20111118_H | |
41 | #define COMMAND_SW20111118_H | |
42 | ||
92f5a8d4 | 43 | #include "config.h" |
7c673cae FG |
44 | #include "lists.h" |
45 | #include "rules.h" | |
f67539c2 | 46 | #include "jam_strings.h" |
7c673cae FG |
47 | |
48 | ||
49 | typedef struct _cmd CMD; | |
50 | ||
51 | /* | |
52 | * A list whose elements are either TARGETS or CMDS. | |
53 | * CMDLIST is used only by CMD. A TARGET means that | |
54 | * the CMD is the last updating action required to | |
55 | * build the target. A CMD is the next CMD required | |
56 | * to build the same target. (Note that a single action | |
57 | * can update more than one target, so the CMDs form | |
58 | * a DAG, not a straight linear list.) | |
59 | */ | |
60 | typedef struct _cmdlist { | |
61 | struct _cmdlist * next; | |
62 | union { | |
63 | CMD * cmd; | |
64 | TARGET * t; | |
65 | } impl; | |
66 | char iscmd; | |
67 | } CMDLIST; | |
68 | ||
69 | CMDLIST * cmdlist_append_cmd( CMDLIST *, CMD * ); | |
70 | CMDLIST * cmdlist_append_target( CMDLIST *, TARGET * ); | |
71 | void cmd_list_free( CMDLIST * ); | |
72 | ||
73 | struct _cmd | |
74 | { | |
75 | CMDLIST * next; | |
76 | RULE * rule; /* rule->actions contains shell script */ | |
77 | LIST * shell; /* $(JAMSHELL) value */ | |
78 | LOL args; /* LISTs for $(<), $(>) */ | |
79 | string buf[ 1 ]; /* actual commands */ | |
80 | int noop; /* no-op commands should be faked instead of executed */ | |
81 | int asynccnt; /* number of outstanding dependencies */ | |
82 | TARGETS * lock; /* semaphores that are required by this cmd. */ | |
83 | TARGETS * unlock; /* semaphores that are released when this cmd finishes. */ | |
84 | char status; /* the command status */ | |
85 | }; | |
86 | ||
87 | CMD * cmd_new | |
88 | ( | |
89 | RULE * rule, /* rule (referenced) */ | |
90 | LIST * targets, /* $(<) (ownership transferred) */ | |
91 | LIST * sources, /* $(>) (ownership transferred) */ | |
92 | LIST * shell /* $(JAMSHELL) (ownership transferred) */ | |
93 | ); | |
94 | ||
95 | void cmd_release_targets_and_shell( CMD * ); | |
96 | ||
97 | void cmd_free( CMD * ); | |
98 | ||
99 | #define cmd_next( c ) ((c)->next) | |
100 | ||
101 | #endif |