Remove our local modifications to sqlite's os_unix.c now that

third_party/sqlite/src/src/os_unix.c

Index: third_party/sqlite/src/src/os_unix.c
diff --git a/third_party/sqlite/src/src/os_unix.c b/third_party/sqlite/src/src/os_unix.c
index 3ebfa04bbb21f17b8643539cbb59de159a108e30..ef04a72e4528b4a1b45b27a2e8cc373a328e0117 100644
--- a/third_party/sqlite/src/src/os_unix.c
+++ b/third_party/sqlite/src/src/os_unix.c
@@ -3215,7 +3215,6 @@ static int unixDeviceCharacteristics(sqlite3_file *NotUsed){
 ********************** End sqlite3_file Methods *******************************
 ******************************************************************************/
 
-
 /*
 ** This division contains definitions of sqlite3_io_methods objects that
 ** implement various file locking strategies.  It also contains definitions
@@ -3813,73 +3812,6 @@ static UnixUnusedFd *findReusableFd(const char *zPath, int flags){
 }
 
 /*
-** Initializes a unixFile structure with zeros.
-*/
-void chromium_sqlite3_initialize_unix_sqlite3_file(sqlite3_file* file) {
-  memset(file, 0, sizeof(unixFile));
-}
-
-int chromium_sqlite3_fill_in_unix_sqlite3_file(sqlite3_vfs* vfs,
-                                               int fd,
-                                               int dirfd,
-                                               sqlite3_file* file,
-                                               const char* fileName,
-                                               int noLock,
-                                               int isDelete) {
-  return fillInUnixFile(vfs, fd, dirfd, file, fileName, noLock, isDelete);
-}
-
-/*
-** Search for an unused file descriptor that was opened on the database file.
-** If a suitable file descriptor if found, then it is stored in *fd; otherwise,
-** *fd is not modified.
-**
-** If a reusable file descriptor is not found, and a new UnixUnusedFd cannot
-** be allocated, SQLITE_NOMEM is returned. Otherwise, SQLITE_OK is returned.
-*/
-int chromium_sqlite3_get_reusable_file_handle(sqlite3_file* file,
-                                              const char* fileName,
-                                              int flags,
-                                              int* fd) {
-  unixFile* unixSQLite3File = (unixFile*)file;
-  int fileType = flags & 0xFFFFFF00;
-  if (fileType == SQLITE_OPEN_MAIN_DB) {
-    UnixUnusedFd *unusedFd = findReusableFd(fileName, flags);
-    if (unusedFd) {
-      *fd = unusedFd->fd;
-    } else {
-      unusedFd = sqlite3_malloc(sizeof(*unusedFd));
-      if (!unusedFd) {
-        return SQLITE_NOMEM;
-      }
-    }
-    unixSQLite3File->pUnused = unusedFd;
-  }
-  return SQLITE_OK;
-}
-
-/*
-** Marks 'fd' as the unused file descriptor for 'pFile'.
-*/
-void chromium_sqlite3_update_reusable_file_handle(sqlite3_file* file,
-                                                  int fd,
-                                                  int flags) {
-  unixFile* unixSQLite3File = (unixFile*)file;
-  if (unixSQLite3File->pUnused) {
-    unixSQLite3File->pUnused->fd = fd;
-    unixSQLite3File->pUnused->flags = flags;
-  }
-}
-
-/*
-** Destroys pFile's field that keeps track of the unused file descriptor.
-*/
-void chromium_sqlite3_destroy_reusable_file_handle(sqlite3_file* file) {
-  unixFile* unixSQLite3File = (unixFile*)file;
-  sqlite3_free(unixSQLite3File->pUnused);
-}
-
-/*
 ** Open the file zPath.
 ** 
 ** Previously, the SQLite OS layer used three functions in place of this
@@ -3961,13 +3893,20 @@ static int unixOpen(
        || eType==SQLITE_OPEN_TRANSIENT_DB
   );
 
-  chromium_sqlite3_initialize_unix_sqlite3_file(pFile);
+  memset(p, 0, sizeof(unixFile));
 
   if( eType==SQLITE_OPEN_MAIN_DB ){
-    rc = chromium_sqlite3_get_reusable_file_handle(pFile, zName, flags, &fd);
-    if( rc!=SQLITE_OK ){
-      return rc;
+    UnixUnusedFd *pUnused;
+    pUnused = findReusableFd(zName, flags);
+    if( pUnused ){
+      fd = pUnused->fd;
+    }else{
+      pUnused = sqlite3_malloc(sizeof(*pUnused));
+      if( !pUnused ){
+        return SQLITE_NOMEM;
+      }
     }
+    p->pUnused = pUnused;
   }else if( !zName ){
     /* If zName is NULL, the upper layer is requesting a temp file. */
     assert(isDelete && !isOpenDirectory);
@@ -4010,7 +3949,10 @@ static int unixOpen(
     *pOutFlags = flags;
   }
 
-  chromium_sqlite3_update_reusable_file_handle(pFile, fd, flags);
+  if( p->pUnused ){
+    p->pUnused->fd = fd;
+    p->pUnused->flags = flags;
+  }
 
   if( isDelete ){
 #if OS_VXWORKS
@@ -4082,11 +4024,11 @@ static int unixOpen(
     }
   }
 #endif
-
+  
   rc = fillInUnixFile(pVfs, fd, dirfd, pFile, zPath, noLock, isDelete);
 open_finished:
   if( rc!=SQLITE_OK ){
-    chromium_sqlite3_destroy_reusable_file_handle(pFile);
+    sqlite3_free(p->pUnused);
   }
   return rc;
 }