[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/src/mutex_w32.c

Index: third_party/sqlite/sqlite-src-3080704/src/mutex_w32.c
diff --git a/third_party/sqlite/sqlite-src-3080704/src/mutex_w32.c b/third_party/sqlite/sqlite-src-3080704/src/mutex_w32.c
deleted file mode 100644
index da7d73f7c5896931836a7315cc444001fff24f2b..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-src-3080704/src/mutex_w32.c
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
-** 2007 August 14
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-*************************************************************************
-** This file contains the C functions that implement mutexes for Win32.
-*/
-#include "sqliteInt.h"
-
-#if SQLITE_OS_WIN
-/*
-** Include code that is common to all os_*.c files
-*/
-#include "os_common.h"
-
-/*
-** Include the header file for the Windows VFS.
-*/
-#include "os_win.h"
-#endif
-
-/*
-** The code in this file is only used if we are compiling multithreaded
-** on a Win32 system.
-*/
-#ifdef SQLITE_MUTEX_W32
-
-/*
-** Each recursive mutex is an instance of the following structure.
-*/
-struct sqlite3_mutex {
-  CRITICAL_SECTION mutex;    /* Mutex controlling the lock */
-  int id;                    /* Mutex type */
-#ifdef SQLITE_DEBUG
-  volatile int nRef;         /* Number of enterances */
-  volatile DWORD owner;      /* Thread holding this mutex */
-  volatile int trace;        /* True to trace changes */
-#endif
-};
-
-/*
-** These are the initializer values used when declaring a "static" mutex
-** on Win32.  It should be noted that all mutexes require initialization
-** on the Win32 platform.
-*/
-#define SQLITE_W32_MUTEX_INITIALIZER { 0 }
-
-#ifdef SQLITE_DEBUG
-#define SQLITE3_MUTEX_INITIALIZER { SQLITE_W32_MUTEX_INITIALIZER, 0, \
-                                    0L, (DWORD)0, 0 }
-#else
-#define SQLITE3_MUTEX_INITIALIZER { SQLITE_W32_MUTEX_INITIALIZER, 0 }
-#endif
-
-#ifdef SQLITE_DEBUG
-/*
-** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routine are
-** intended for use only inside assert() statements.
-*/
-static int winMutexHeld(sqlite3_mutex *p){
-  return p->nRef!=0 && p->owner==GetCurrentThreadId();
-}
-
-static int winMutexNotheld2(sqlite3_mutex *p, DWORD tid){
-  return p->nRef==0 || p->owner!=tid;
-}
-
-static int winMutexNotheld(sqlite3_mutex *p){
-  DWORD tid = GetCurrentThreadId();
-  return winMutexNotheld2(p, tid);
-}
-#endif
-
-/*
-** Initialize and deinitialize the mutex subsystem.
-*/
-static sqlite3_mutex winMutex_staticMutexes[] = {
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER,
-  SQLITE3_MUTEX_INITIALIZER
-};
-
-static int winMutex_isInit = 0;
-static int winMutex_isNt = -1; /* <0 means "need to query" */
-
-/* As the winMutexInit() and winMutexEnd() functions are called as part
-** of the sqlite3_initialize() and sqlite3_shutdown() processing, the
-** "interlocked" magic used here is probably not strictly necessary.
-*/
-static LONG SQLITE_WIN32_VOLATILE winMutex_lock = 0;
-
-int sqlite3_win32_is_nt(void); /* os_win.c */
-void sqlite3_win32_sleep(DWORD milliseconds); /* os_win.c */
-
-static int winMutexInit(void){
-  /* The first to increment to 1 does actual initialization */
-  if( InterlockedCompareExchange(&winMutex_lock, 1, 0)==0 ){
-    int i;
-    for(i=0; i<ArraySize(winMutex_staticMutexes); i++){
-#if SQLITE_OS_WINRT
-      InitializeCriticalSectionEx(&winMutex_staticMutexes[i].mutex, 0, 0);
-#else
-      InitializeCriticalSection(&winMutex_staticMutexes[i].mutex);
-#endif
-    }
-    winMutex_isInit = 1;
-  }else{
-    /* Another thread is (in the process of) initializing the static
-    ** mutexes */
-    while( !winMutex_isInit ){
-      sqlite3_win32_sleep(1);
-    }
-  }
-  return SQLITE_OK;
-}
-
-static int winMutexEnd(void){
-  /* The first to decrement to 0 does actual shutdown
-  ** (which should be the last to shutdown.) */
-  if( InterlockedCompareExchange(&winMutex_lock, 0, 1)==1 ){
-    if( winMutex_isInit==1 ){
-      int i;
-      for(i=0; i<ArraySize(winMutex_staticMutexes); i++){
-        DeleteCriticalSection(&winMutex_staticMutexes[i].mutex);
-      }
-      winMutex_isInit = 0;
-    }
-  }
-  return SQLITE_OK;
-}
-
-/*
-** The sqlite3_mutex_alloc() routine allocates a new
-** mutex and returns a pointer to it.  If it returns NULL
-** that means that a mutex could not be allocated.  SQLite
-** will unwind its stack and return an error.  The argument
-** to sqlite3_mutex_alloc() is one of these integer constants:
-**
-** <ul>
-** <li>  SQLITE_MUTEX_FAST
-** <li>  SQLITE_MUTEX_RECURSIVE
-** <li>  SQLITE_MUTEX_STATIC_MASTER
-** <li>  SQLITE_MUTEX_STATIC_MEM
-** <li>  SQLITE_MUTEX_STATIC_OPEN
-** <li>  SQLITE_MUTEX_STATIC_PRNG
-** <li>  SQLITE_MUTEX_STATIC_LRU
-** <li>  SQLITE_MUTEX_STATIC_PMEM
-** <li>  SQLITE_MUTEX_STATIC_APP1
-** <li>  SQLITE_MUTEX_STATIC_APP2
-** <li>  SQLITE_MUTEX_STATIC_APP3
-** </ul>
-**
-** The first two constants cause sqlite3_mutex_alloc() to create
-** a new mutex.  The new mutex is recursive when SQLITE_MUTEX_RECURSIVE
-** is used but not necessarily so when SQLITE_MUTEX_FAST is used.
-** The mutex implementation does not need to make a distinction
-** between SQLITE_MUTEX_RECURSIVE and SQLITE_MUTEX_FAST if it does
-** not want to.  But SQLite will only request a recursive mutex in
-** cases where it really needs one.  If a faster non-recursive mutex
-** implementation is available on the host platform, the mutex subsystem
-** might return such a mutex in response to SQLITE_MUTEX_FAST.
-**
-** The other allowed parameters to sqlite3_mutex_alloc() each return
-** a pointer to a static preexisting mutex.  Six static mutexes are
-** used by the current version of SQLite.  Future versions of SQLite
-** may add additional static mutexes.  Static mutexes are for internal
-** use by SQLite only.  Applications that use SQLite mutexes should
-** use only the dynamic mutexes returned by SQLITE_MUTEX_FAST or
-** SQLITE_MUTEX_RECURSIVE.
-**
-** Note that if one of the dynamic mutex parameters (SQLITE_MUTEX_FAST
-** or SQLITE_MUTEX_RECURSIVE) is used then sqlite3_mutex_alloc()
-** returns a different mutex on every call.  But for the static
-** mutex types, the same mutex is returned on every call that has
-** the same type number.
-*/
-static sqlite3_mutex *winMutexAlloc(int iType){
-  sqlite3_mutex *p;
-
-  switch( iType ){
-    case SQLITE_MUTEX_FAST:
-    case SQLITE_MUTEX_RECURSIVE: {
-      p = sqlite3MallocZero( sizeof(*p) );
-      if( p ){
-#ifdef SQLITE_DEBUG
-        p->id = iType;
-#ifdef SQLITE_WIN32_MUTEX_TRACE_DYNAMIC
-        p->trace = 1;
-#endif
-#endif
-#if SQLITE_OS_WINRT
-        InitializeCriticalSectionEx(&p->mutex, 0, 0);
-#else
-        InitializeCriticalSection(&p->mutex);
-#endif
-      }
-      break;
-    }
-    default: {
-      assert( iType-2 >= 0 );
-      assert( iType-2 < ArraySize(winMutex_staticMutexes) );
-      assert( winMutex_isInit==1 );
-      p = &winMutex_staticMutexes[iType-2];
-#ifdef SQLITE_DEBUG
-      p->id = iType;
-#ifdef SQLITE_WIN32_MUTEX_TRACE_STATIC
-      p->trace = 1;
-#endif
-#endif
-      break;
-    }
-  }
-  return p;
-}
-
-
-/*
-** This routine deallocates a previously
-** allocated mutex.  SQLite is careful to deallocate every
-** mutex that it allocates.
-*/
-static void winMutexFree(sqlite3_mutex *p){
-  assert( p );
-#ifdef SQLITE_DEBUG
-  assert( p->nRef==0 && p->owner==0 );
-  assert( p->id==SQLITE_MUTEX_FAST || p->id==SQLITE_MUTEX_RECURSIVE );
-#endif
-  assert( winMutex_isInit==1 );
-  DeleteCriticalSection(&p->mutex);
-  sqlite3_free(p);
-}
-
-/*
-** The sqlite3_mutex_enter() and sqlite3_mutex_try() routines attempt
-** to enter a mutex.  If another thread is already within the mutex,
-** sqlite3_mutex_enter() will block and sqlite3_mutex_try() will return
-** SQLITE_BUSY.  The sqlite3_mutex_try() interface returns SQLITE_OK
-** upon successful entry.  Mutexes created using SQLITE_MUTEX_RECURSIVE can
-** be entered multiple times by the same thread.  In such cases the,
-** mutex must be exited an equal number of times before another thread
-** can enter.  If the same thread tries to enter any other kind of mutex
-** more than once, the behavior is undefined.
-*/
-static void winMutexEnter(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
-#ifdef SQLITE_DEBUG
-  assert( p );
-  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld2(p, tid) );
-#else
-  assert( p );
-#endif
-  assert( winMutex_isInit==1 );
-  EnterCriticalSection(&p->mutex);
-#ifdef SQLITE_DEBUG
-  assert( p->nRef>0 || p->owner==0 );
-  p->owner = tid;
-  p->nRef++;
-  if( p->trace ){
-    OSTRACE(("ENTER-MUTEX tid=%lu, mutex=%p (%d), nRef=%d\n",
-             tid, p, p->trace, p->nRef));
-  }
-#endif
-}
-
-static int winMutexTry(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
-  int rc = SQLITE_BUSY;
-  assert( p );
-  assert( p->id==SQLITE_MUTEX_RECURSIVE || winMutexNotheld2(p, tid) );
-  /*
-  ** The sqlite3_mutex_try() routine is very rarely used, and when it
-  ** is used it is merely an optimization.  So it is OK for it to always
-  ** fail.
-  **
-  ** The TryEnterCriticalSection() interface is only available on WinNT.
-  ** And some windows compilers complain if you try to use it without
-  ** first doing some #defines that prevent SQLite from building on Win98.
-  ** For that reason, we will omit this optimization for now.  See
-  ** ticket #2685.
-  */
-#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0400
-  assert( winMutex_isInit==1 );
-  assert( winMutex_isNt>=-1 && winMutex_isNt<=1 );
-  if( winMutex_isNt<0 ){
-    winMutex_isNt = sqlite3_win32_is_nt();
-  }
-  assert( winMutex_isNt==0 || winMutex_isNt==1 );
-  if( winMutex_isNt && TryEnterCriticalSection(&p->mutex) ){
-#ifdef SQLITE_DEBUG
-    p->owner = tid;
-    p->nRef++;
-#endif
-    rc = SQLITE_OK;
-  }
-#else
-  UNUSED_PARAMETER(p);
-#endif
-#ifdef SQLITE_DEBUG
-  if( p->trace ){
-    OSTRACE(("TRY-MUTEX tid=%lu, mutex=%p (%d), owner=%lu, nRef=%d, rc=%s\n",
-             tid, p, p->trace, p->owner, p->nRef, sqlite3ErrName(rc)));
-  }
-#endif
-  return rc;
-}
-
-/*
-** The sqlite3_mutex_leave() routine exits a mutex that was
-** previously entered by the same thread.  The behavior
-** is undefined if the mutex is not currently entered or
-** is not currently allocated.  SQLite will never do either.
-*/
-static void winMutexLeave(sqlite3_mutex *p){
-#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
-  DWORD tid = GetCurrentThreadId();
-#endif
-  assert( p );
-#ifdef SQLITE_DEBUG
-  assert( p->nRef>0 );
-  assert( p->owner==tid );
-  p->nRef--;
-  if( p->nRef==0 ) p->owner = 0;
-  assert( p->nRef==0 || p->id==SQLITE_MUTEX_RECURSIVE );
-#endif
-  assert( winMutex_isInit==1 );
-  LeaveCriticalSection(&p->mutex);
-#ifdef SQLITE_DEBUG
-  if( p->trace ){
-    OSTRACE(("LEAVE-MUTEX tid=%lu, mutex=%p (%d), nRef=%d\n",
-             tid, p, p->trace, p->nRef));
-  }
-#endif
-}
-
-sqlite3_mutex_methods const *sqlite3DefaultMutex(void){
-  static const sqlite3_mutex_methods sMutex = {
-    winMutexInit,
-    winMutexEnd,
-    winMutexAlloc,
-    winMutexFree,
-    winMutexEnter,
-    winMutexTry,
-    winMutexLeave,
-#ifdef SQLITE_DEBUG
-    winMutexHeld,
-    winMutexNotheld
-#else
-    0,
-    0
-#endif
-  };
-  return &sMutex;
-}
-
-#endif /* SQLITE_MUTEX_W32 */