Fix two asserts on the scratch allocator to allow for up to two outstanding

scratch allocations per thread.

FossilOrigin-Name: f149b498b6ada3fc9f71ee104c351554c80c7f8a

manifest

@@ -1,8 +1,8 @@
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-C Suppress\sa\scouple\suninitialized\svariable\swarnings.
-D 2010-06-26T20:00:54
+C Fix\stwo\sasserts\son\sthe\sscratch\sallocator\sto\sallow\sfor\sup\sto\stwo\soutstanding\nscratch\sallocations\sper\sthread.
+D 2010-06-26T20:25:31
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in a5cad1f8f3e021356bfcc6c77dc16f6f1952bbc3
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -139,7 +139,7 @@ F src/legacy.c a199d7683d60cef73089e892409113e69c23a99f
 F src/lempar.c 7f026423f4d71d989e719a743f98a1cbd4e6d99e
 F src/loadext.c 1c7a61ce1281041f437333f366a96aa0d29bb581
 F src/main.c a667105394a7e7d173727b96affd35f65b28e608
-F src/malloc.c a08f16d134f0bfab6b20c3cd142ebf3e58235a6a
+F src/malloc.c 09c3777bf733a387bec6aa344e455eb4e8ecf47e
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c 89d4ea8d5cdd55635cbaa48ad53132af6294cbb2
 F src/mem2.c 2ee7bdacda8299b5a91cff9f7ee3e46573195c38
@@ -830,14 +830,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
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+R 00c2bd7be8afec6a59e72273f1ab30d7
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manifest.uuid

@@ -1 +1 @@
-29571e228cc85f7768c3ad57d0c7af96b5a54983
+f149b498b6ada3fc9f71ee104c351554c80c7f8a

src/malloc.c

@@ -315,11 +315,11 @@ void *sqlite3ScratchMalloc(int n){
   assert( n>0 );
 
 #if SQLITE_THREADSAFE==0 && !defined(NDEBUG)
-  /* Verify that no more than one scratch allocation per thread
+  /* Verify that no more than two scratch allocation per thread
   ** is outstanding at one time.  (This is only checked in the
   ** single-threaded case since checking in the multi-threaded case
   ** would be much more complicated.) */
-  assert( scratchAllocOut==0 );
+  assert( scratchAllocOut<=1 );
 #endif
 
   if( sqlite3GlobalConfig.szScratch<n ){
@@ -364,16 +364,6 @@ scratch_overflow:
 }
 void sqlite3ScratchFree(void *p){
   if( p ){
-
-#if SQLITE_THREADSAFE==0 && !defined(NDEBUG)
-    /* Verify that no more than one scratch allocation per thread
-    ** is outstanding at one time.  (This is only checked in the
-    ** single-threaded case since checking in the multi-threaded case
-    ** would be much more complicated.) */
-    assert( scratchAllocOut==1 );
-    scratchAllocOut = 0;
-#endif
-
     if( sqlite3GlobalConfig.pScratch==0
            || p<sqlite3GlobalConfig.pScratch
            || p>=(void*)mem0.aScratchFree ){
@@ -399,6 +389,16 @@ void sqlite3ScratchFree(void *p){
       mem0.aScratchFree[mem0.nScratchFree++] = i;
       sqlite3StatusAdd(SQLITE_STATUS_SCRATCH_USED, -1);
       sqlite3_mutex_leave(mem0.mutex);
+
+#if SQLITE_THREADSAFE==0 && !defined(NDEBUG)
+    /* Verify that no more than two scratch allocation per thread
+    ** is outstanding at one time.  (This is only checked in the
+    ** single-threaded case since checking in the multi-threaded case
+    ** would be much more complicated.) */
+    assert( scratchAllocOut>=1 && scratchAllocOut<=2 );
+    scratchAllocOut = 0;
+#endif
+
     }
   }
 }