projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
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 | ||
| 43 | #include "lists.h" | |
| 44 | #include "rules.h" | |
| 45 | #include "strings.h" | |
| 46 | ||
| 47 | ||
| 48 | typedef struct _cmd CMD; | |
| 49 | ||
| 50 | /* | |
| 51 | * A list whose elements are either TARGETS or CMDS. | |
| 52 | * CMDLIST is used only by CMD. A TARGET means that | |
| 53 | * the CMD is the last updating action required to | |
| 54 | * build the target. A CMD is the next CMD required | |
| 55 | * to build the same target. (Note that a single action | |
| 56 | * can update more than one target, so the CMDs form | |
| 57 | * a DAG, not a straight linear list.) | |
| 58 | */ | |
| 59 | typedef struct _cmdlist { | |
| 60 | struct _cmdlist * next; | |
| 61 | union { | |
| 62 | CMD * cmd; | |
| 63 | TARGET * t; | |
| 64 | } impl; | |
| 65 | char iscmd; | |
| 66 | } CMDLIST; | |
| 67 | ||
| 68 | CMDLIST * cmdlist_append_cmd( CMDLIST *, CMD * ); | |
| 69 | CMDLIST * cmdlist_append_target( CMDLIST *, TARGET * ); | |
| 70 | void cmd_list_free( CMDLIST * ); | |
| 71 | ||
| 72 | struct _cmd | |
| 73 | { | |
| 74 | CMDLIST * next; | |
| 75 | RULE * rule; /* rule->actions contains shell script */ | |
| 76 | LIST * shell; /* $(JAMSHELL) value */ | |
| 77 | LOL args; /* LISTs for $(<), $(>) */ | |
| 78 | string buf[ 1 ]; /* actual commands */ | |
| 79 | int noop; /* no-op commands should be faked instead of executed */ | |
| 80 | int asynccnt; /* number of outstanding dependencies */ | |
| 81 | TARGETS * lock; /* semaphores that are required by this cmd. */ | |
| 82 | TARGETS * unlock; /* semaphores that are released when this cmd finishes. */ | |
| 83 | char status; /* the command status */ | |
| 84 | }; | |
| 85 | ||
| 86 | CMD * cmd_new | |
| 87 | ( | |
| 88 | RULE * rule, /* rule (referenced) */ | |
| 89 | LIST * targets, /* $(<) (ownership transferred) */ | |
| 90 | LIST * sources, /* $(>) (ownership transferred) */ | |
| 91 | LIST * shell /* $(JAMSHELL) (ownership transferred) */ | |
| 92 | ); | |
| 93 | ||
| 94 | void cmd_release_targets_and_shell( CMD * ); | |
| 95 | ||
| 96 | void cmd_free( CMD * ); | |
| 97 | ||
| 98 | #define cmd_next( c ) ((c)->next) | |
| 99 | ||
| 100 | #endif |