diff options
Diffstat (limited to 'nuttx/drivers/bch/bchlib_refs.c')
-rw-r--r-- | nuttx/drivers/bch/bchlib_refs.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/nuttx/drivers/bch/bchlib_refs.c b/nuttx/drivers/bch/bchlib_refs.c new file mode 100644 index 000000000..43ecf061a --- /dev/null +++ b/nuttx/drivers/bch/bchlib_refs.c @@ -0,0 +1,123 @@ +/**************************************************************************** + * drivers/bch/bchlib_refs.c + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Compilation Switches + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#if 0 +#include <sys/stat.h> +#include <sys/ioctl.h> + +#include <unistd.h> +#include <string.h> +#include <fcntl.h> +#include <sched.h> + +#include <nuttx/fs.h> +#include <nuttx/ioctl.h> +#endif + +#include <semaphore.h> +#include <errno.h> +#include <assert.h> +#include <debug.h> + +#include "bch_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: bchlib_incref + ****************************************************************************/ + +int bchlib_incref(FAR struct bchlib_s *bch) +{ + bchlib_semtake(bch); + if (bch->refs == MAX_OPENCNT) + { + return -EMFILE; + } + else + { + bch->refs++; + } + bchlib_semgive(bch); + return OK; +} + +/**************************************************************************** + * Name: bchlib_decref + ****************************************************************************/ + +int bchlib_decref(FAR struct bchlib_s *bch) +{ + bchlib_semtake(bch); + if (bch->refs == 0) + { + return -EIO; + } + else + { + bch->refs--; + } + bchlib_semgive(bch); + return OK; +} |