diff options
Diffstat (limited to 'libdimension/dimension')
| -rw-r--r-- | libdimension/dimension/interior.h | 2 | ||||
| -rw-r--r-- | libdimension/dimension/refcount.h | 55 | ||||
| -rw-r--r-- | libdimension/dimension/texture.h | 4 |
3 files changed, 58 insertions, 3 deletions
diff --git a/libdimension/dimension/interior.h b/libdimension/dimension/interior.h index 88af0b9..76f0a32 100644 --- a/libdimension/dimension/interior.h +++ b/libdimension/dimension/interior.h @@ -33,7 +33,7 @@ typedef struct dmnsn_interior { void *ptr; /** @internal Reference count. */ - unsigned int *refcount; + dmnsn_refcount *refcount; } dmnsn_interior; /** diff --git a/libdimension/dimension/refcount.h b/libdimension/dimension/refcount.h new file mode 100644 index 0000000..14f31ab --- /dev/null +++ b/libdimension/dimension/refcount.h @@ -0,0 +1,55 @@ +/************************************************************************* + * Copyright (C) 2011 Tavian Barnes <tavianator@tavianator.com> * + * * + * This file is part of The Dimension Library. * + * * + * The Dimension Library is free software; you can redistribute it and/ * + * or modify it under the terms of the GNU Lesser General Public License * + * as published by the Free Software Foundation; either version 3 of the * + * License, or (at your option) any later version. * + * * + * The Dimension Library is distributed in the hope that it will be * + * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this program. If not, see * + * <http://www.gnu.org/licenses/>. * + *************************************************************************/ + +/** + * @file + * Generic reference count implementation. + */ + +/** + * Increment a reference count. + * @param[in,out] object The reference-counted object to acquire. + */ +#define DMNSN_INCREF(obj) ((void)++(*(obj)->refcount)) + +/** + * Decrement a reference count. + * @param[in,out] object The reference-counted object to release. + * @return Whether the object is now garbage. + */ +#define DMNSN_DECREF(obj) (*(obj)->refcount == 0 || --(*(obj)->refcount) == 0) + +/** + * Reference counter. + */ +typedef unsigned int dmnsn_refcount; + +/** + * Create a reference count. + * @return A new reference counter, initialized to zero (a "borrowed" reference, + * which will be garbage-collected the first time it is deleted). + */ +dmnsn_refcount *dmnsn_new_refcount(void); + +/** + * Delete a reference count. Raises an error if the reference count wasn't + * zero. + */ +void dmnsn_delete_refcount(dmnsn_refcount *refcount); diff --git a/libdimension/dimension/texture.h b/libdimension/dimension/texture.h index 31ab86b..8051c02 100644 --- a/libdimension/dimension/texture.h +++ b/libdimension/dimension/texture.h @@ -31,8 +31,8 @@ typedef struct { dmnsn_matrix trans; /**< Transformation matrix. */ dmnsn_matrix trans_inv; /**< The inverse of the transformation matrix. */ - unsigned int *refcount; /**< @internal Reference count. */ - bool should_init; /**< @internal Whether to initialize the texture. */ + dmnsn_refcount *refcount; /**< @internal Reference count. */ + bool should_init; /**< @internal Whether to initialize the texture. */ } dmnsn_texture; /** |