add function fc_ftok

HISTORY

@@ -1,8 +1,9 @@
 
-Version 1.35  2017-02-16
+Version 1.35  2017-02-20
   * logger judge log_level in function log_it_ex and log_it_ex1
   * add php extension function: fastcommon_file_put_contents
   * add function fc_safe_read and fc_safe_write
+  * add function fc_ftok
 
 Version 1.34  2017-02-06
   * ini_file_reader: LOCAL_IP support CIDR addresses

src/shared_func.c

@@ -2556,3 +2556,10 @@ ssize_t fc_safe_read(int fd, char *buf, const size_t count)
 
     return count - remain;
 }
+
+key_t fc_ftok(const char *path, const int proj_id)
+{
+    int hash_code;
+    hash_code = simple_hash(path, strlen(path));
+    return (((proj_id & 0xFF) << 24) | (hash_code & 0xFFFFFF));
+}

src/shared_func.h

@@ -651,6 +651,14 @@ ssize_t fc_lock_write(int fd, const char *buf, const size_t nbyte);
 */
 ssize_t fc_safe_read(int fd, char *buf, const size_t count);
 
+/** ftok with hash code
+ *  parameters:
+ *  	path: the file path
+ *  	proj_id: the project id
+ *  return: read bytes for success, -1 when fail
+*/
+key_t fc_ftok(const char *path, const int proj_id);
+
 #ifdef __cplusplus
 }
 #endif