FS-11827: [Core] Add feature allowing FreeSWITCH to store CORE DB (SQLite) fully in memory (core-db-dsn).

src/include/switch_core.h

@@ -1854,6 +1854,13 @@ SWITCH_DECLARE(switch_codec_t *) switch_core_session_get_video_write_codec(_In_
 */
 SWITCH_DECLARE(switch_core_db_t *) switch_core_db_open_file(const char *filename);
 
+/*!
+  \brief Open a core db (SQLite) in-memory
+  \param uri to the db to open
+  \return the db handle
+*/
+SWITCH_DECLARE(switch_core_db_t *) switch_core_db_open_in_memory(const char *uri);
+
 /*!
   \brief Execute a sql stmt until it is accepted
   \param db the db handle
@@ -2485,7 +2492,8 @@ typedef int (*switch_core_db_event_callback_func_t) (void *pArg, switch_event_t
 #define CACHE_DB_LEN 256
 typedef enum {
 	CDF_INUSE = (1 << 0),
-	CDF_PRUNE = (1 << 1)
+	CDF_PRUNE = (1 << 1),
+	CDF_NONEXPIRING = (1 << 2)
 } cache_db_flag_t;
 
 typedef enum {
@@ -2495,13 +2503,14 @@ typedef enum {
 } switch_cache_db_handle_type_t;
 
 typedef union {
-	switch_core_db_t *core_db_dbh;
+	switch_core_db_handle_t *core_db_dbh;
 	switch_odbc_handle_t *odbc_dbh;
 	switch_database_interface_handle_t *database_interface_dbh;
 } switch_cache_db_native_handle_t;
 
 typedef struct {
 	char *db_path;
+	switch_bool_t in_memory;
 } switch_cache_db_core_db_options_t;
 
 typedef struct {

src/include/switch_core_db.h

@@ -51,6 +51,12 @@ SWITCH_BEGIN_EXTERN_C
  * following opaque structure.
 */
 	typedef struct sqlite3 switch_core_db_t;
+
+struct switch_core_db_handle {
+	switch_bool_t in_memory;
+	switch_core_db_t *handle;
+};
+
 typedef struct sqlite3_stmt switch_core_db_stmt_t;
 
 typedef int (*switch_core_db_callback_func_t) (void *pArg, int argc, char **argv, char **columnNames);
@@ -102,6 +108,11 @@ SWITCH_DECLARE(int) switch_core_db_close(switch_core_db_t *db);
  */
 SWITCH_DECLARE(int) switch_core_db_open(const char *filename, switch_core_db_t **ppDb);
 
+/**
+	Same as switch_core_db_open() but additionally allows SQLITE_OPEN_URI
+ */
+SWITCH_DECLARE(int) switch_core_db_open_v2(const char *filename, switch_core_db_t **ppDb);
+
 /**
  * ^Strings returned by sqlite3_column_text() and sqlite3_column_text16(),
  * even empty strings, are always zero-terminated.  ^The return

src/include/switch_types.h

@@ -2318,6 +2318,7 @@ typedef struct switch_codec_implementation switch_codec_implementation_t;
 typedef struct switch_buffer switch_buffer_t;
 typedef union  switch_codec_settings switch_codec_settings_t;
 typedef struct switch_codec_fmtp switch_codec_fmtp_t;
+typedef struct switch_core_db_handle switch_core_db_handle_t;
 typedef struct switch_odbc_handle switch_odbc_handle_t;
 typedef struct switch_database_interface_handle switch_database_interface_handle_t;