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7c673cae FG |
1 | /* |
2 | * Copyright 1994 Christopher Seiwald. | |
3 | * | |
4 | * This file is part of Jam - see jam.c for Copyright information. | |
5 | */ | |
6 | ||
1e59de90 TL |
7 | /* This file is ALSO: |
8 | * Copyright 2022 René Ferdinand Rivera Morell | |
9 | * Distributed under the Boost Software License, Version 1.0. | |
10 | * (See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt) | |
11 | */ | |
12 | ||
7c673cae FG |
13 | /* |
14 | * command.h - the CMD structure and routines to manipulate them | |
15 | * | |
16 | * Both ACTION and CMD contain a rule, targets, and sources. An | |
17 | * ACTION describes a rule to be applied to the given targets and | |
18 | * sources; a CMD is what actually gets executed by the shell. The | |
19 | * differences are due to: | |
20 | * | |
21 | * ACTIONS must be combined if 'actions together' is given. | |
22 | * ACTIONS must be split if 'actions piecemeal' is given. | |
23 | * ACTIONS must have current sources omitted for 'actions updated'. | |
24 | * | |
25 | * The CMD datatype holds a single command that is to be executed | |
26 | * against a target, and they can chain together to represent the | |
27 | * full collection of commands used to update a target. | |
28 | * | |
29 | * Structures: | |
30 | * | |
31 | * CMD - an action, ready to be formatted into a buffer and executed. | |
32 | * | |
33 | * External routines: | |
34 | * | |
35 | * cmd_new() - return a new CMD or 0 if too many args. | |
36 | * cmd_free() - delete CMD and its parts. | |
37 | * cmd_next() - walk the CMD chain. | |
38 | * cmd_release_targets_and_shell() - CMD forgets about its targets & shell. | |
39 | */ | |
40 | ||
41 | ||
42 | /* | |
43 | * CMD - an action, ready to be formatted into a buffer and executed. | |
44 | */ | |
45 | ||
46 | #ifndef COMMAND_SW20111118_H | |
47 | #define COMMAND_SW20111118_H | |
48 | ||
92f5a8d4 | 49 | #include "config.h" |
7c673cae | 50 | #include "lists.h" |
1e59de90 | 51 | #include "mem.h" |
7c673cae | 52 | #include "rules.h" |
f67539c2 | 53 | #include "jam_strings.h" |
7c673cae FG |
54 | |
55 | ||
56 | typedef struct _cmd CMD; | |
57 | ||
58 | /* | |
59 | * A list whose elements are either TARGETS or CMDS. | |
60 | * CMDLIST is used only by CMD. A TARGET means that | |
61 | * the CMD is the last updating action required to | |
62 | * build the target. A CMD is the next CMD required | |
63 | * to build the same target. (Note that a single action | |
64 | * can update more than one target, so the CMDs form | |
65 | * a DAG, not a straight linear list.) | |
66 | */ | |
67 | typedef struct _cmdlist { | |
68 | struct _cmdlist * next; | |
69 | union { | |
70 | CMD * cmd; | |
71 | TARGET * t; | |
72 | } impl; | |
73 | char iscmd; | |
74 | } CMDLIST; | |
75 | ||
76 | CMDLIST * cmdlist_append_cmd( CMDLIST *, CMD * ); | |
77 | CMDLIST * cmdlist_append_target( CMDLIST *, TARGET * ); | |
78 | void cmd_list_free( CMDLIST * ); | |
79 | ||
80 | struct _cmd | |
81 | { | |
82 | CMDLIST * next; | |
83 | RULE * rule; /* rule->actions contains shell script */ | |
84 | LIST * shell; /* $(JAMSHELL) value */ | |
85 | LOL args; /* LISTs for $(<), $(>) */ | |
86 | string buf[ 1 ]; /* actual commands */ | |
87 | int noop; /* no-op commands should be faked instead of executed */ | |
88 | int asynccnt; /* number of outstanding dependencies */ | |
1e59de90 TL |
89 | targets_ptr lock; /* semaphores that are required by this cmd. */ |
90 | targets_uptr unlock; /* semaphores that are released when this cmd finishes. */ | |
7c673cae FG |
91 | char status; /* the command status */ |
92 | }; | |
93 | ||
94 | CMD * cmd_new | |
95 | ( | |
96 | RULE * rule, /* rule (referenced) */ | |
97 | LIST * targets, /* $(<) (ownership transferred) */ | |
98 | LIST * sources, /* $(>) (ownership transferred) */ | |
99 | LIST * shell /* $(JAMSHELL) (ownership transferred) */ | |
100 | ); | |
101 | ||
102 | void cmd_release_targets_and_shell( CMD * ); | |
103 | ||
104 | void cmd_free( CMD * ); | |
105 | ||
106 | #define cmd_next( c ) ((c)->next) | |
107 | ||
108 | #endif |