more TDB

source/libs/tdb/src/db/pgcache.c

@@ -122,7 +122,7 @@ int pgCacheClose(SPgCache *pPgCache) {
   return 0;
 }
 
-SPage *pgCacheFetch(SPgCache *pPgCache) {
+SPage *pgCacheFetch(SPgCache *pPgCache, pgid_t pgid) {
   // TODO
   return NULL;
 }

source/libs/tdb/src/db/pgfile.c

@@ -14,3 +14,29 @@
  */
 
 #include "tdbInt.h"
+
+int pgFileOpen(const char *fname, SPgCache *pPgCache, SPgFile **ppPgFile) {
+  SPgFile *pPgFile;
+  // TODO
+  return 0;
+}
+
+int pgFileClose(SPgFile *pPgFile) {
+  // TODO
+  return 0;
+}
+
+SPage *pgFileFetch(SPgFile *pPgFile, pgno_t pgno) {
+  // TODO
+  return NULL;
+}
+
+int pgFileRelease(SPage *pPage) {
+  // TODO
+  return 0;
+}
+
+int pgFileWrite(SPage *pPage) {
+  // TODO
+  return 0;
+}
\ No newline at end of file

source/libs/tdb/src/inc/pgcache.h

@@ -25,11 +25,11 @@ typedef struct SPage    SPage;
 
 // SPgCache
 int pgCacheCreate(SPgCache **ppPgCache, pgsize_t pgSize, int32_t npage);
+int pgCacheDestroy(SPgCache *pPgCache);
 int pgCacheOpen(SPgCache **ppPgCache);
 int pgCacheClose(SPgCache *pPgCache);
-int pgCacheClose(SPgCache *pPgCache);
 
-SPage *pgCacheFetch(SPgCache *pPgCache);
+SPage *pgCacheFetch(SPgCache *pPgCache, pgid_t pgid);
 int    pgCacheRelease(SPage *pPage);
 
 // SPage

source/libs/tdb/src/inc/pgfile.h

@@ -21,12 +21,22 @@ extern "C" {
 #endif
 
 typedef struct SPgFile SPgFile;
-
 struct SPgFile {
   char *    fname;                    // backend file name
+  uint8_t   fileid[TDB_FILE_ID_LEN];  // file id
   SPgCache *pPgCache;                 // page cache underline
+  int       fd;
+  pgno_t    pgFileSize;
 };
 
+int pgFileOpen(const char *fname, SPgCache *pPgCache, SPgFile **ppPgFile);
+int pgFileClose(SPgFile *pPgFile);
+
+SPage *pgFileFetch(SPgFile *pPgFile, pgno_t pgno);
+int    pgFileRelease(SPage *pPage);
+
+int pgFileWrite(SPage *pPage);
+
 #ifdef __cplusplus
 }
 #endif