From 71be5465628262f1a475b52eaf90c5caba5876ea Mon Sep 17 00:00:00 2001 From: Jan Chadima Date: Mon, 2 Aug 2010 10:56:34 +0200 Subject: Initial userspace library version --- userspace/ncrypto_fd.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 userspace/ncrypto_fd.c (limited to 'userspace/ncrypto_fd.c') diff --git a/userspace/ncrypto_fd.c b/userspace/ncrypto_fd.c new file mode 100644 index 0000000..fe35529 --- /dev/null +++ b/userspace/ncrypto_fd.c @@ -0,0 +1,37 @@ + +#include +#include +#include +#include "../ncr.h" +#include "ncrypto.h" + +int __ncr_file_descriptor = -1; +static int open_count = 0; +static pthread_mutex_t open_lock = PTHREAD_MUTEX_INITIALIZER; + +int +ncr_global_init(unsigned int flags) +{ + int rv = 0; + + /* Open the crypto device unles is not already initialized */ + pthread_mutex_lock(&open_lock); + if ((__ncr_file_descriptor < 0) && ((__ncr_file_descriptor = open("/dev/crypto", O_RDWR)) < 0)) + rv = -1; + else + ++open_count; + pthread_mutex_unlock(&open_lock); + return rv; +} + +void +ncr_global_deinit(void) +{ + pthread_mutex_lock(&open_lock); + if (!--open_count && (__ncr_file_descriptor >= 0)) { + close(__ncr_file_descriptor); + __ncr_file_descriptor = -1; + } + pthread_mutex_unlock(&open_lock); +} + -- cgit