Add the xInMutex method to the os-layer switch for testing whether or not

mutexes are used correctly. (CVS 2851)

FossilOrigin-Name: a582b159595ff8d31c81e9b3044711d6590d3f0e

manifest

@@ -1,5 +1,5 @@
-C Additional\stests\sfor\sdescending\sindices.\s\sComment\schanges.\s(CVS\s2850)
-D 2006-01-02T18:24:40
+C Add\sthe\sxInMutex\smethod\sto\sthe\sos-layer\sswitch\sfor\stesting\swhether\sor\snot\nmutexes\sare\sused\scorrectly.\s(CVS\s2851)
+D 2006-01-02T20:00:13
 F Makefile.in e3c6b3a38d734d41574c04f2fc90d18de2b87102
 F Makefile.linux-gcc aee18d8a05546dcf1888bd4547e442008a49a092
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -51,13 +51,13 @@ F src/legacy.c 59757d857ab95fcbb0ac27692d3201e35f093dd7
 F src/main.c c93f80d1fcaf3ed508d62a163819b10a730c2fb7
 F src/md5.c c5fdfa5c2593eaee2e32a5ce6c6927c986eaf217
 F src/os.c 7b4a002d9c9421580276db55d2329636a604e8ef
-F src/os.h e941992043b127fdb1bd114f0b4319ae1c4562a7
+F src/os.h cc99e1515696728ba64c77fffa781ebadea34619
 F src/os_common.h d0b1f2f32926e9b6db7886a7f43008b596a9e926
 F src/os_test.c 49833426101f99aee4bb5f6a44b7c4b2029fda1c
 F src/os_test.h 903c93554c23d88f34f667f1979e4a1cee792af3
-F src/os_unix.c 6394d2fa3a8bfbceb227579b44b4b343b5b54a8f
+F src/os_unix.c e4fbf1370e1a03875ebb3239316fa8eb8476258b
 F src/os_unix.h 5768d56d28240d3fe4537fac08cc85e4fb52279e
-F src/os_win.c 9feb97f49b93d451f8ef7c5dd388e05a44647dc6
+F src/os_win.c 7e2d09f81cb83709b9774ac6be80fa3cb08ac86d
 F src/os_win.h 41a946bea10f61c158ce8645e7646b29d44f122b
 F src/pager.c 681b4e39d581ead8fd54283176138bec924a4bae
 F src/pager.h e0acb095b3ad0bca48f2ab00c87346665643f64f
@@ -333,7 +333,7 @@ F www/tclsqlite.tcl ddcf912ea48695603c8ed7efb29f0812ef8d1b49
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P a4aa0911bccd0627cd6d926c5bdd2a4f4b8f6cc5
-R c2bfcb4903f64a4a18ff50a2924cea57
+P 2622c5242b0cba5bc19f190a7c209ab9ed8f57e0
+R 9a09811315517f7461beef7a4469c2f0
 U drh
-Z 1c84688d70590b66b4c8fd7b5cde6cad
+Z c6af3ad936269fab04fee23696f1a4d8

manifest.uuid

@@ -1 +1 @@
-2622c5242b0cba5bc19f190a7c209ab9ed8f57e0
+a582b159595ff8d31c81e9b3044711d6590d3f0e

src/os.h

@@ -217,12 +217,13 @@ extern struct sqlite3OsVtbl {
   int (*xSyncDirectory)(const char*);
   int (*xTempFileName)(char*);
 
-  int  (*xRandomSeed)(char*);
-  int  (*xSleep)(int ms);
-  int  (*xCurrentTime)(double*);
+  int (*xRandomSeed)(char*);
+  int (*xSleep)(int ms);
+  int (*xCurrentTime)(double*);
 
   void (*xEnterMutex)(void);
   void (*xLeaveMutex)(void);
+  int (*xInMutex)(void);
   void *(*xThreadSpecificData)(int);
 
   void *(*xMalloc)(int);
@@ -238,7 +239,7 @@ extern struct sqlite3OsVtbl {
 ** is intriniscally thread-safe.
 **
 ** External get/set access is only provided to the routines identified 
-** by the hash-defined SQLITE_OS_ROUTINE symbols.
+** by the following SQLITE_OS_ROUTINE symbols:
 */
 #define SQLITE_OS_ROUTINE_OPENREADWRITE   1
 #define SQLITE_OS_ROUTINE_OPENREADONLY    2

src/os_unix.c

@@ -1586,6 +1586,16 @@ static void unixLeaveMutex(){
 #endif
 }
 
+/*
+** Return TRUE if we are currently within the mutex and FALSE if not.
+** This routine is intended for sanity checking only.  It is designed
+** for use in an assert() to verify that the mutex is held or not held
+** in certain routines.
+*/
+static int unixInMutex(){
+  return inMutex;
+}
+
 /*
 ** This function is called automatically when a thread exists to delete
 ** the threads SqliteTsd structure. 
@@ -1706,6 +1716,7 @@ struct sqlite3OsVtbl sqlite3Os = {
   unixCurrentTime,
   unixEnterMutex,
   unixLeaveMutex,
+  unixInMutex,
   unixThreadSpecificData,
   genericMalloc,
   genericRealloc,

src/os_win.c

@@ -990,6 +990,17 @@ static void winLeaveMutex(){
 #endif
 }
 
+/*
+** Return TRUE if we are currently within the mutex and FALSE if not.
+** This routine is intended for sanity checking only.  It is designed
+** for use in an assert() to verify that the mutex is held or not held
+** in certain routines.
+*/
+static int winInMutex(){
+  return inMutex;
+}
+
+
 /*
 ** The following variable, if set to a non-zero value, becomes the result
 ** returned from sqlite3OsCurrentTime().  This is used for testing.
@@ -1062,6 +1073,7 @@ struct sqlite3OsVtbl sqlite3Os = {
   winCurrentTime,
   winEnterMutex,
   winLeaveMutex,
+  winInMutex,
   winThreadSpecificData,
   genericMalloc,
   genericRealloc,