dbi utils: Added compat layer for DBI < 0.9.

[sysdb.git] / src / utils / dbi.c

diff --git a/src/utils/dbi.c b/src/utils/dbi.c
index de2348e713d34e82924bbf4870d252d186626803..b1fdaf127896aaf35863ec1a8cfd208c62982d6d 100644 (file)
--- a/src/utils/dbi.c
+++ b/src/utils/dbi.c
@@ -41,6 +41,62 @@
 #include <stdlib.h>
 #include <string.h>
 
+/*
+ * pre 0.9 DBI compat layer
+ */
+
+#if LIBDBI_VERSION < 900
+#include <pthread.h>
+
+typedef void *dbi_inst;
+
+static pthread_mutex_t dbi_lock = PTHREAD_MUTEX_INITIALIZER;
+static int dbi_initialized = 0;
+
+static int
+initialize_r(const char *driverdir, dbi_inst __attribute__((unused)) *pInst)
+{
+       int status = 0;
+       pthread_mutex_lock(&dbi_lock);
+       if (! dbi_initialized)
+               status = dbi_initialize(driverdir);
+       dbi_initialized = 1;
+       pthread_mutex_unlock(&dbi_lock);
+       return status;
+} /* initialize_r */
+
+static dbi_driver
+driver_open_r(const char *name, dbi_inst __attribute__((unused)) Inst)
+{
+       dbi_driver driver;
+       pthread_mutex_lock(&dbi_lock);
+       driver = dbi_driver_open(name);
+       pthread_mutex_unlock(&dbi_lock);
+       return driver;
+} /* driver_open_r */
+
+static dbi_driver
+driver_list_r(dbi_driver Current, dbi_inst __attribute__((unused)) Inst)
+{
+       dbi_driver driver;
+       pthread_mutex_lock(&dbi_lock);
+       driver = dbi_driver_list(Current);
+       pthread_mutex_unlock(&dbi_lock);
+       return driver;
+} /* driver_list_r */
+
+static void
+shutdown_r(dbi_inst __attribute__((unused)) Inst)
+{
+       /* do nothing; we don't know if DBI is still in use */
+} /* shutdown_r */
+
+#define dbi_initialize_r initialize_r
+#define dbi_driver_open_r driver_open_r
+#define dbi_driver_list_r driver_list_r
+#define dbi_shutdown_r shutdown_r
+#endif /* LIBDBI_VERSION < 900 */
+
 /*
  * private data types
  */