[t:4876], small change to toku_txn_begin relating to input flags

git-svn-id: file:///svn/toku/tokudb@44110 c7de825b-a66e-492c-adef-691d508d4ae1

[t:4876], small change to toku_txn_begin relating to input flags
git-svn-id: file:///svn/toku/tokudb@44110 c7de825b-a66e-492c-adef-691d508d4ae1
13240984 · Zardosht Kasheff · Yoni Fogel · 205f8c4c · 13240984
Commit 13240984 authored Apr 17, 2013 by Zardosht Kasheff Committed by Yoni Fogel Apr 17, 2013
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Showing with 31 additions and 34 deletions

src/ydb_txn.c src/ydb_txn.c +31 -34

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--- a/src/ydb_txn.c
+++ b/src/ydb_txn.c
@@ -374,40 +374,37 @@ toku_txn_begin(DB_ENV *env, DB_TXN * stxn, DB_TXN ** txn, u_int32_t flags) {
    }
    flags &= ~iso_flags;
-    if (stxn) {
+    switch (iso_flags) {
-        child_isolation = db_txn_struct_i(stxn)->iso;
+        case (DB_INHERIT_ISOLATION):
-    }
+            if (stxn) {
-    else {
+                child_isolation = db_txn_struct_i(stxn)->iso;
-        switch (iso_flags) {
+            }
-            case (DB_INHERIT_ISOLATION):
+            else {
-                if (stxn) {
+                return toku_ydb_do_error(
-                    child_isolation = db_txn_struct_i(stxn)->iso;
+                    env, 
-                }
+                    EINVAL, 
-                else {
+                    "Cannot set DB_INHERIT_ISOLATION when no parent exists\n"
-                    return toku_ydb_do_error(
+                    );                    
-                        env, 
+            }
-                        EINVAL, 
+            break;
-                        "Cannot set DB_INHERIT_ISOLATION when no parent exists\n"
+        case (DB_READ_COMMITTED):
-                        );                    
+            child_isolation = TOKU_ISO_READ_COMMITTED;
-                }
+            break;
-                break;
+        case (DB_READ_UNCOMMITTED):
-            case (DB_READ_COMMITTED):
+            child_isolation = TOKU_ISO_READ_UNCOMMITTED;
-                child_isolation = TOKU_ISO_READ_COMMITTED;
+            break;
-                break;
+        case (DB_TXN_SNAPSHOT):
-            case (DB_READ_UNCOMMITTED):
+            child_isolation = TOKU_ISO_SNAPSHOT;
-                child_isolation = TOKU_ISO_READ_UNCOMMITTED;
+            break;
-                break;
+        case (DB_SERIALIZABLE):
-            case (DB_TXN_SNAPSHOT):
+            child_isolation = TOKU_ISO_SERIALIZABLE;
-                child_isolation = TOKU_ISO_SNAPSHOT;
+            break;
-                break;
+        case (0):
-            case (DB_SERIALIZABLE):
+            child_isolation = stxn ? db_txn_struct_i(stxn)->iso : TOKU_ISO_SERIALIZABLE;
-            case (0):
+            break;
-                child_isolation = TOKU_ISO_SERIALIZABLE;
+        default:
-                break;
+            assert(FALSE); // error path is above, so this should not happen
-            default:
+            break;
-                assert(FALSE); // error path is above, so this should not happen
-                break;
-        }
    }
    if (stxn && child_isolation != db_txn_struct_i(stxn)->iso) {
        return toku_ydb_do_error(