From 9439b02936fc908fcd0c3035789429331b2c9179 Mon Sep 17 00:00:00 2001 From: William Pitcock Date: Mon, 25 Feb 2013 17:36:09 -0600 Subject: [PATCH] cache: add high-level cache API --- Makefile.in | 2 +- cache.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++ pkg.h | 5 ++++ 3 files changed, 84 insertions(+), 1 deletion(-) create mode 100644 cache.c diff --git a/Makefile.in b/Makefile.in index 5a6e258..81d05f3 100644 --- a/Makefile.in +++ b/Makefile.in @@ -11,7 +11,7 @@ pkgconfigdir = @PKGCONFIGDIR@ CC = @CC@ PROG = pkgconf@EXEEXT@ -SRCS = main.c pkg.c bsdstubs.c getopt_long.c fragment.c argvsplit.c fileio.c tuple.c dependency.c queue.c +SRCS = main.c cache.c pkg.c bsdstubs.c getopt_long.c fragment.c argvsplit.c fileio.c tuple.c dependency.c queue.c OBJS = ${SRCS:.c=.o} GCOV_OBJS = ${SRCS:.c=.og} CFLAGS = @CFLAGS@ diff --git a/cache.c b/cache.c new file mode 100644 index 0000000..7ca9d95 --- /dev/null +++ b/cache.c @@ -0,0 +1,78 @@ +/* + * cache.c + * package object cache + * + * Copyright (c) 2013 pkgconf authors (see AUTHORS). + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * This software is provided 'as is' and without any warranty, express or + * implied. In no event shall the authors be liable for any damages arising + * from the use of this software. + */ + +#include "pkg.h" + +static pkg_t *pkg_cache = NULL; + +/* + * pkg_cache_lookup(id) + * + * looks up a package in the cache given an 'id' atom, + * such as 'gtk+-3.0' and returns the already loaded version + * if present. + */ +pkg_t * +pkg_cache_lookup(const char *id) +{ + pkg_t *pkg; + + PKG_FOREACH_LIST_ENTRY(pkg_cache, pkg) + { + if (!strcmp(pkg->id, id)) + return pkg; + } + + return NULL; +} + +/* + * pkg_cache_add(pkg) + * + * adds an entry for the package to the package cache. + * the cache entry must be removed if the package is freed. + */ +void +pkg_cache_add(pkg_t *pkg) +{ + pkg->next = pkg_cache; + pkg_cache = pkg; + + if (pkg->next != NULL) + pkg->next->prev = pkg; +} + +/* + * pkg_cache_delete + * + * deletes a package from the cache entry. + */ +void +pkg_cache_delete(pkg_t *pkg) +{ + if (pkg->prev != NULL) + pkg->prev->next = pkg->next; + + if (pkg->next != NULL) + pkg->next->prev = pkg->prev; + + if (pkg == pkg_cache) + { + if (pkg->prev != NULL) + pkg_cache = pkg->prev; + else + pkg_cache = pkg->next; + } +} diff --git a/pkg.h b/pkg.h index 5b69d1c..f162dbf 100644 --- a/pkg.h +++ b/pkg.h @@ -187,4 +187,9 @@ void pkg_queue_free(pkg_queue_t *head); bool pkg_queue_apply(pkg_queue_t *head, pkg_queue_apply_func_t func, int maxdepth, unsigned int flags, void *data); bool pkg_queue_validate(pkg_queue_t *head, int maxdepth, unsigned int flags); +/* cache.c */ +pkg_t *pkg_cache_lookup(const char *id); +void pkg_cache_add(pkg_t *pkg); +void pkg_cache_remove(pkg_t *pkg); + #endif