Fix swapped FreeLibary return values. Handle FreeLibrary( 0 ) better.

include/process.h

@@ -57,7 +57,7 @@ typedef struct _PDB
     WORD             module;           /* 2a IMTE for the process module */
     WORD             threads;          /* 2c Number of threads */
     WORD             running_threads;  /* 2e Number of running threads */
-    WORD             unknown3;         /* 30 Unknown */
+    WORD             free_lib_count;   /* 30 Recursion depth of FreeLibrary calls */
     WORD             ring0_threads;    /* 32 Number of ring 0 threads */
     HANDLE           system_heap;      /* 34 System heap to allocate handles */
     HTASK            task;             /* 38 Win16 task */
@@ -96,6 +96,7 @@ typedef struct _PDB
 } PDB;
 
 /* Process flags */
+#define PDB32_DEBUGGED      0x0001  /* Process is being debugged */
 #define PDB32_WIN16_PROC    0x0008  /* Win16 process */
 #define PDB32_DOS_PROC      0x0010  /* Dos process */
 #define PDB32_CONSOLE_PROC  0x0020  /* Console process */

loader/module.c

@@ -1529,17 +1529,19 @@ static void MODULE_FlushModrefs(void)
  */
 BOOL WINAPI FreeLibrary(HINSTANCE hLibModule)
 {
-    BOOL retv = TRUE;
+    BOOL retv = FALSE;
     WINE_MODREF *wm;
 
     EnterCriticalSection( &PROCESS_Current()->crit_section );
+    PROCESS_Current()->free_lib_count++;
 
     wm = MODULE32_LookupHMODULE( hLibModule );
-    if ( !wm )
+    if ( !wm || !hLibModule )
         SetLastError( ERROR_INVALID_HANDLE );
     else
         retv = MODULE_FreeLibrary( wm );
 
+    PROCESS_Current()->free_lib_count--;
     LeaveCriticalSection( &PROCESS_Current()->crit_section );
 
     return retv;
@@ -1588,13 +1590,14 @@ BOOL MODULE_FreeLibrary( WINE_MODREF *wm )
     MODULE_DecRefCount( wm );
 
     /* Call process detach notifications */
-    MODULE_DllProcessDetach( FALSE, NULL );
+    if ( PROCESS_Current()->free_lib_count <= 1 )
+        MODULE_DllProcessDetach( FALSE, NULL );
 
     MODULE_FlushModrefs();
 
     TRACE_(module)("(%s) - END\n", wm->modname );
 
-    return FALSE;
+    return TRUE;
 }