~mdw / sod / blame
| Commit | Line | Data |
|---|---|---|
| a42893dd MW |
1 | /* -*-c-*- |
| 2 | * | |
| 3 | * Runtime support for SOD requiring hosted implementation | |
| 4 | * | |
| 5 | * (c) 2015 Straylight/Edgeware | |
| 6 | */ | |
| 7 | ||
| 8 | /*----- Licensing notice --------------------------------------------------* | |
| 9 | * | |
| 10 | * This file is part of the Sensible Object Design, an object system for C. | |
| 11 | * | |
| 12 | * SOD is free software; you can redistribute it and/or modify | |
| 13 | * it under the terms of the GNU Library General Public License as | |
| 14 | * published by the Free Software Foundation; either version 2 of the | |
| 15 | * License, or (at your option) any later version. | |
| 16 | * | |
| 17 | * SOD is distributed in the hope that it will be useful, | |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 20 | * GNU Library General Public License for more details. | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU Library General Public | |
| 23 | * License along with SOD; if not, write to the Free | |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 25 | * MA 02111-1307, USA. | |
| 26 | */ | |
| 27 | ||
| 28 | /*----- Header files ------------------------------------------------------*/ | |
| 29 | ||
| 30 | #include <stdlib.h> | |
| 31 | ||
| 32 | #include "sod.h" | |
| 33 | ||
| 34 | /*----- Main code ---------------------------------------------------------*/ | |
| 35 | ||
| 36 | /* --- @sod_make@, @sod_makev@ --- * | |
| 37 | * | |
| 38 | * Arguments: @const SodClass *cls@ = class object for new instance | |
| 39 | * @va_list ap, ...@ = initialization keyword arguments | |
| 40 | * | |
| 41 | * Returns: Pointer to the newly-allocated initialized instance, or null. | |
| 42 | * | |
| 43 | * Use: Allocates storage for a new instance, initializes it, and | |
| 44 | * returns a pointer to it. If allocation fails, a null pointer | |
| 45 | * is returned instead. | |
| 46 | * | |
| 47 | * This function will allocate the storage using @malloc@, and | |
| 48 | * then initialize it as for @sod_init@. | |
| 49 | * | |
| 50 | * It's usually convenient to use the macro @SOD_MAKE@ rather | |
| 51 | * than calling @sod_make@ directly. | |
| 52 | * | |
| 53 | * (This function is not available in freestanding environments | |
| 54 | * lacking @malloc@ and @free@.) | |
| 55 | */ | |
| 56 | ||
| 57 | void *sod_make(const SodClass *cls, ...) | |
| 58 | { | |
| 59 | void *p; | |
| 60 | va_list ap; | |
| 61 | ||
| 62 | va_start(ap, cls); | |
| 63 | p = sod_makev(cls, ap); | |
| 64 | va_end(ap); | |
| 65 | return (p); | |
| 66 | } | |
| 67 | ||
| 68 | void *sod_makev(const SodClass *cls, va_list ap) | |
| 69 | { | |
| 70 | void *p; | |
| 71 | ||
| 72 | if ((p = malloc(cls->cls.initsz)) == 0) return (0); | |
| 73 | return (sod_initv(cls, p, ap)); | |
| 74 | } | |
| 75 | ||
| 76 | /* --- @sod_destroy@ --- * | |
| 77 | * | |
| 78 | * Arguments: @void *p@ = pointer to an instance to be torn down, or null | |
| 79 | * | |
| 80 | * Returns: Zero if the object was freed; nonzero if it refused for some | |
| 81 | * reason. | |
| 82 | * | |
| 83 | * Use: Invokes the instance's `teardown' method to release any held | |
| 84 | * resources, and then calls @free@ to release the instance's | |
| 85 | * storage. See @sod_teardown@ for details, especially | |
| 86 | * regarding the return value's meaning. | |
| 87 | * | |
| 88 | * If @p@ is null, then this function does nothing except | |
| 89 | * returns zero. | |
| 90 | * | |
| 91 | * (This function is not available in freestanding environments | |
| 92 | * lacking @malloc@ and @free@.) | |
| 93 | */ | |
| 94 | ||
| 95 | int sod_destroy(void *p) | |
| 96 | { | |
| 97 | int rc; | |
| 98 | ||
| 99 | if (!p) return (0); | |
| 100 | rc = sod_teardown(p); | |
| 101 | if (!rc) free(p); | |
| 102 | return (rc); | |
| 103 | } | |
| 104 | ||
| 105 | /*----- That's all, folks -------------------------------------------------*/ |