public GlobalStatics(
bool memstat,
bool coreMutex,
bool fullMutex,
bool openUri,
int maxStrlen,
int lookasideSize,
int lookasides,
//sqlite3_mem_methods m,
//sqlite3_mutex_methods mutex,
//array_t<byte[]> heap,
//int minReq, int maxReq,
byte[][] scratch,
int scratchSize,
int scratchs,
bool sharedCacheEnabled,
bool isInit,
bool inProgress,
bool isMutexInit,
bool isMallocInit,
MutexEx initMutex,
int initMutexRefs,
Action <object, int, string> log,
object logArg,
bool localtimeFault
#if ENABLE_SQLLOG
, Action <object, TagBase, string, int> Sqllog,
object SqllogArg
#endif
)
{
Memstat = memstat;
CoreMutex = coreMutex;
OpenUri = openUri;
FullMutex = fullMutex;
MaxStrlen = maxStrlen;
LookasideSize = lookasideSize;
Lookasides = lookasides;
//m = m;
//mutex = mutex;
//Heap = heap;
//MaxReq = minReq; MinReq = maxReq;
Scratch = scratch;
ScratchSize = scratchSize;
Scratchs = scratchs;
SharedCacheEnabled = sharedCacheEnabled;
IsInit = isInit;
InProgress = inProgress;
IsMutexInit = isMutexInit;
IsMallocInit = isMallocInit;
InitMutex = initMutex;
InitMutexRefs = initMutexRefs;
Log = log;
LogArg = logArg;
LocaltimeFault = localtimeFault;
#if ENABLE_SQLLOG
Sqllog = sqllog;
SqllogArg = sqllogArg;
#endif
}
public static void MemReleaseExternal(Mem mem)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
if ((mem.Flags & MEM.Agg) != 0)
{
MemFinalize(mem, mem.u.Def);
Debug.Assert((mem.Flags & MEM.Agg) == 0);
MemRelease(mem);
}
else if ((mem.Flags & MEM.Dyn) != 0 && mem.Del != null)
{
Debug.Assert((mem.Flags & MEM.RowSet) == 0);
mem.Del(mem.Z);
mem.Del = null;
}
else if ((mem.Flags & MEM.RowSet) != 0)
{
RowSet_Clear(mem.u.RowSet);
}
else if ((mem.Flags & MEM.Frame) != 0)
{
MemSetNull(mem);
}
mem.N = 0;
mem.Z = null;
mem.Z_ = null;
}
public static RC MemExpandBlob(Mem mem)
{
if ((mem.Flags & MEM.Zero) != 0)
{
Debug.Assert((mem.Flags & MEM.Blob) != 0);
Debug.Assert((mem.Flags & MEM.RowSet) == 0);
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
// Set nByte to the number of bytes required to store the expanded blob.
int bytes = mem.N + mem.u.Zeros;
if (bytes <= 0)
{
bytes = 1;
}
if (MemGrow(mem, bytes, true) != 0)
{
return(RC.NOMEM);
}
//: _memset(&mem->Z[mem->N], 0, mem->u.Zeros);
mem.Z_ = Encoding.UTF8.GetBytes(mem.Z);
mem.Z = null;
mem.N += (int)mem.u.Zeros;
mem.u.I = 0;
mem.Flags &= ~(MEM.Zero | MEM.Static | MEM.Ephem | MEM.Term);
mem.Flags |= MEM.Dyn;
}
return(RC.OK);
}
static RC BindText(Vdbe p, int i, string z, int n, Action <string> del, TEXTENCODE encoding)
{
RC rc = VdbeUnbind(p, i);
if (rc == RC.OK)
{
if (z != null)
{
Mem var = p.Vars[i - 1];
rc = MemSetStr(var, z, n, encoding, del);
if (rc == RC.OK && encoding != 0)
{
rc = ChangeEncoding(var, E.CTXENCODE(p.Ctx));
}
SysEx.Error(p.Ctx, rc, 0);
rc = SysEx.ApiExit(p.Ctx, rc);
}
MutexEx.Leave(p.Ctx.Mutex);
}
else if (del != null)
{
del(z);
}
return(rc);
}
public static long IntValue(Mem mem)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
// assert( EIGHT_BYTE_ALIGNMENT(pMem) );
MEM flags = mem.Flags;
if ((flags & MEM.Int) != 0)
{
return(mem.u.I);
}
else if ((flags & MEM.Real) != 0)
{
return(DoubleToInt64(mem.R));
}
else if ((flags & (MEM.Str)) != 0)
{
Debug.Assert(mem.Z != null || mem.N == 0);
C.ASSERTCOVERAGE(mem.Z == null);
long value;
ConvertEx.Atoi64(mem.Z, out value, mem.N, mem.Encode);
return(value);
}
else if ((flags & (MEM.Blob)) != 0)
{
Debug.Assert(mem.Z_ != null || mem.N == 0);
C.ASSERTCOVERAGE(mem.Z_ == null);
long value;
ConvertEx.Atoi64(Encoding.UTF8.GetString(mem.Z_, 0, mem.N), out value, mem.N, mem.Encode);
return(value);
}
return(0);
}
public static RC MemNumerify(Mem mem)
{
if ((mem.Flags & (MEM.Int | MEM.Real | MEM.Null)) == 0)
{
Debug.Assert((mem.Flags & (MEM.Blob | MEM.Str)) != 0);
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
if ((mem.Flags & MEM.Blob) != 0 && mem.Z == null)
{
if (ConvertEx.Atoi64(Encoding.UTF8.GetString(mem.Z_, 0, mem.Z_.Length), out mem.u.I, mem.N, mem.Encode) == 0)
{
E.MemSetTypeFlag(mem, MEM.Int);
}
else
{
mem.R = RealValue(mem);
E.MemSetTypeFlag(mem, MEM.Real);
IntegerAffinity(mem);
}
}
else if (ConvertEx.Atoi64(mem.Z, out mem.u.I, mem.N, mem.Encode) == 0)
{
E.MemSetTypeFlag(mem, MEM.Int);
}
else
{
mem.R = RealValue(mem);
E.MemSetTypeFlag(mem, MEM.Real);
IntegerAffinity(mem);
}
}
Debug.Assert((mem.Flags & (MEM.Int | MEM.Real | MEM.Null)) != 0);
mem.Flags &= ~(MEM.Str | MEM.Blob);
return(RC.OK);
}
public static double RealValue(Mem mem)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
//Debug.Assert(C._HASALIGNMENT8(mem));
if ((mem.Flags & MEM.Real) != 0)
{
return(mem.R);
}
else if ((mem.Flags & MEM.Int) != 0)
{
return((double)mem.u.I);
}
else if ((mem.Flags & (MEM.Str)) != 0)
{
double val = (double)0;
ConvertEx.Atof(mem.Z, ref val, mem.N, mem.Encode);
return(val);
}
else if ((mem.Flags & (MEM.Blob)) != 0)
{
double val = (double)0;
Debug.Assert(mem.Z_ != null || mem.N == 0);
ConvertEx.Atof(Encoding.UTF8.GetString(mem.Z_, 0, mem.N), ref val, mem.N, mem.Encode);
return(val);
}
return((double)0);
}
public static void Result_ErrorNoMem(FuncContext fctx)
{
Debug.Assert(MutexEx.Held(fctx.S.Ctx.Mutex));
MemSetNull(fctx.S);
fctx.IsError = RC.NOMEM;
fctx.S.Ctx.MallocFailed = true;
}
public static RC Reprepare(Vdbe p)
{
Context ctx = p.Ctx;
Debug.Assert(MutexEx.Held(ctx.Mutex));
string sql = Vdbe.Sql(p);
Debug.Assert(sql != null); // Reprepare only called for prepare_v2() statements
Vdbe newVdbe = new Vdbe();
RC rc = LockAndPrepare(ctx, sql, -1, false, p, ref newVdbe, null);
if (rc != 0)
{
if (rc == RC.NOMEM)
{
ctx.MallocFailed = true;
}
Debug.Assert(newVdbe == null);
return(rc);
}
else
{
Debug.Assert(newVdbe != null);
}
Vdbe.Swap((Vdbe)newVdbe, p);
Vdbe.TransferBindings(newVdbe, (Vdbe)p);
newVdbe.ResetStepResult();
newVdbe.Finalize();
return(RC.OK);
}
public static RC Prepare16(Context ctx, string sql, int bytes, bool isPrepareV2, out Vdbe stmtOut, out string tailOut)
{
// This function currently works by first transforming the UTF-16 encoded string to UTF-8, then invoking sqlite3_prepare(). The
// tricky bit is figuring out the pointer to return in *pzTail.
stmtOut = null;
if (!sqlite3SafetyCheckOk(ctx))
{
return(SysEx.MISUSE_BKPT());
}
MutexEx.Enter(ctx.Mutex);
RC rc = RC.OK;
string tail8 = null;
string sql8 = Vdbe.Utf16to8(ctx, sql, bytes, TEXTENCODE.UTF16NATIVE);
if (sql8 != null)
{
rc = LockAndPrepare(ctx, sql8, -1, isPrepareV2, null, ref stmtOut, ref tail8);
}
if (tail8 != null && tailOut != null)
{
// If sqlite3_prepare returns a tail pointer, we calculate the equivalent pointer into the UTF-16 string by counting the unicode
// characters between zSql8 and zTail8, and then returning a pointer the same number of characters into the UTF-16 string.
Debugger.Break();
//: int charsParsed = Vdbe::Utf8CharLen(sql8, (int)(tail8 - sql8));
//: *tailOut = (uint8 *)sql + Vdbe::Utf16ByteLen(sql, charsParsed);
}
C._tagfree(ctx, ref sql8);
rc = SysEx.ApiExit(ctx, rc);
MutexEx.Leave(ctx.Mutex);
return(rc);
}
public static RC Config(Context ctx, VTABLECONFIG op, object arg1)
{
RC rc = RC.OK;
MutexEx.Enter(ctx.Mutex);
switch (op)
{
case VTABLECONFIG.CONSTRAINT:
{
VTableContext p = ctx.VTableCtx;
if (p == null)
{
rc = SysEx.MISUSE_BKPT();
}
else
{
Debug.Assert(p.Table == null || (p.Table.TabFlags & TF.Virtual) != 0);
p.VTable.Constraint = (bool)arg1;
}
break;
}
default:
rc = SysEx.MISUSE_BKPT();
break;
}
if (rc != RC.OK)
{
Main.Error(ctx, rc, null);
}
MutexEx.Leave(ctx.Mutex);
return(rc);
}
public static RC DeclareVTable(Context ctx, string createTableName)
{
MutexEx.Enter(ctx.Mutex);
Table table;
if (ctx.VTableCtx == null || (table = ctx.VTableCtx.Table) == null)
{
sqlite3Error(ctx, RC.MISUSE, null);
MutexEx.Leave(ctx.Mutex);
return(SysEx.MISUSE_BKPT());
}
Debug.Assert((table.TabFlags & TF.Virtual) != 0);
RC rc = RC.OK;
Parse parse = new Parse(); //: _stackalloc(ctx, sizeof(Parse));
if (parse == null)
{
rc = RC.NOMEM;
}
else
{
parse.DeclareVTable = true;
parse.Ctx = ctx;
parse.QueryLoops = 1;
string error = null;
if (sqlite3RunParser(parse, createTableName, ref error) == RC.OK && parse.NewTable != null && !ctx.MallocFailed && parse.NewTable.Select == null && (parse.NewTable.TabFlags & TF.Virtual) == 0)
{
if (table.Cols.data == null)
{
table.Cols.data = parse.NewTable.Cols.data;
table.Cols.length = parse.NewTable.Cols.length;
parse.NewTable.Cols.length = 0;
parse.NewTable.Cols.data = null;
}
ctx.VTableCtx.Table = null;
}
else
{
sqlite3Error(ctx, RC.ERROR, (error != null ? "%s" : null), error);
C._tagfree(ctx, ref error);
rc = RC.ERROR;
}
parse.DeclareVTable = false;
if (parse.V != null)
{
parse.V.Finalize();
}
Parse.DeleteTable(ctx, ref parse.NewTable);
parse = null; //: C._stackfree(ctx, parse);
}
Debug.Assert(((int)rc & 0xff) == (int)rc);
rc = SysEx.ApiExit(ctx, rc);
MutexEx.Leave(ctx.Mutex);
return(rc);
}
public static RC MemRealify(Mem mem)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
//Debug.Assert(C._HASALIGNMENT8(mem));
mem.R = RealValue(mem);
E.MemSetTypeFlag(mem, MEM.Real);
return(RC.OK);
}
public static Vdbe Stmt_Next(Context ctx, Vdbe p)
{
MutexEx.Enter(ctx.Mutex);
Vdbe next = (p == null ? ctx.Vdbes[0] : p.Next);
MutexEx.Leave(ctx.Mutex);
return(next);
}
public static RC UnregisterVfs(VSystem vfs)
{
var mutex = MutexEx.Alloc(MutexEx.MUTEX.STATIC_MASTER);
MutexEx.Enter(mutex);
UnlinkVfs(vfs);
MutexEx.Leave(mutex);
return(RC.OK);
}
public static void CloseExtensions(Context ctx)
{
Debug.Assert(MutexEx.Held(ctx.Mutex));
for (int i = 0; i < ctx.Extensions.length; i++)
{
ctx.Vfs.DlClose((HANDLE)ctx.Extensions[i]);
}
C._tagfree(ctx, ref ctx.Extensions.data);
}
public RC SetAuthorizer(Context ctx, Func <object, int, string, string, string, string, ARC> auth, object arg)
{
MutexEx.Enter(ctx.Mutex);
ctx.Auth = auth;
ctx.AuthArg = arg;
Vdbe.ExpirePreparedStatements(ctx);
MutexEx.Leave(ctx.Mutex);
return(RC.OK);
}
public static RC LoadExtension(Context ctx, string fileName, string procName, ref string errMsg)
{
MutexEx.Enter(ctx.Mutex);
RC rc = LoadExtension_(ctx, fileName, procName, ref errMsg);
rc = ApiExit(ctx, rc);
MutexEx.Leave(ctx.Mutex);
return(rc);
}
public static RC MemIntegerify(Mem mem)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
Debug.Assert((mem.Flags & MEM.RowSet) == 0);
//Debug.Assert(C._HASALIGNMENT8(mem));
mem.u.I = IntValue(mem);
E.MemSetTypeFlag(mem, MEM.Int);
return(RC.OK);
}
static void ColumnMallocFailure(Vdbe p)
{
// If malloc() failed during an encoding conversion within an sqlite3_column_XXX API, then set the return code of the statement to
// RC_NOMEM. The next call to _step() (if any) will return RC_ERROR and _finalize() will return NOMEM.
if (p != null)
{
p.RC_ = SysEx.ApiExit(p.Ctx, p.RC_);
MutexEx.Leave(p.Ctx.Mutex);
}
}
public static RC Bind_Null(Vdbe p, int i)
{
RC rc = VdbeUnbind(p, i);
if (rc == RC.OK)
{
MutexEx.Leave(p.Ctx.Mutex);
}
return(rc);
}
public static RC MemStringify(Mem mem, TEXTENCODE encode)
{
MEM f = mem.Flags;
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
Debug.Assert((f & MEM.Zero) == 0);
Debug.Assert((f & (MEM.Str | MEM.Blob)) == 0);
Debug.Assert((f & (MEM.Int | MEM.Real)) != 0);
Debug.Assert((mem.Flags & MEM.RowSet) == 0);
//: Debug.Assert(C._HASALIGNMENT8(mem));
const int bytes = 32;
if (MemGrow(mem, bytes, false) != 0)
{
return(RC.NOMEM);
}
// For a Real or Integer, use sqlite3_mprintf() to produce the UTF-8 string representation of the value. Then, if the required encoding
// is UTF-16le or UTF-16be do a translation.
// FIX ME: It would be better if sqlite3_snprintf() could do UTF-16.
if ((f & MEM.Int) != 0)
{
mem.Z = mem.u.I.ToString(); //: __snprintf(mem->Z, bytes, "%lld", mem->u.I);
}
else
{
Debug.Assert((f & MEM.Real) != 0);
if (double.IsNegativeInfinity(mem.R))
{
mem.Z = "-Inf";
}
else if (double.IsInfinity(mem.R))
{
mem.Z = "Inf";
}
else if (double.IsPositiveInfinity(mem.R))
{
mem.Z = "+Inf";
}
else if (mem.R.ToString(CultureInfo.InvariantCulture).Contains("."))
{
mem.Z = mem.R.ToString(CultureInfo.InvariantCulture).ToLower(); //: __snprintf(mem->Z, bytes, "%!.15g", mem->R);
}
else
{
mem.Z = mem.R.ToString(CultureInfo.InvariantCulture) + ".0";
}
}
mem.N = mem.Z.Length;
mem.Encode = TEXTENCODE.UTF8;
mem.Flags |= MEM.Str | MEM.Term;
ChangeEncoding(mem, encode);
return(RC.OK);
}
public static RC Bind_Zeroblob(Vdbe p, int i, int n)
{
RC rc = VdbeUnbind(p, i);
if (rc == RC.OK)
{
MemSetZeroBlob(p.Vars[i - 1], n);
MutexEx.Leave(p.Ctx.Mutex);
}
return(rc);
}
public static object get_Auxdata(FuncContext fctx, int arg)
{
Debug.Assert(MutexEx.Held(fctx.S.Ctx.Mutex));
VdbeFunc vdbeFunc = fctx.VdbeFunc;
if (vdbeFunc == null || arg >= vdbeFunc.AuxsLength || arg < 0)
{
return(null);
}
return(vdbeFunc.Auxs[arg].Aux);
}
public static RC Bind_Double(Vdbe p, int i, double value)
{
RC rc = VdbeUnbind(p, i);
if (rc == RC.OK)
{
MemSetDouble(p.Vars[i - 1], value);
MutexEx.Leave(p.Ctx.Mutex);
}
return(rc);
}
public static RC Bind_Int64(Vdbe p, int i, long value)
{
RC rc = VdbeUnbind(p, i);
if (rc == RC.OK)
{
MemSetInt64(p.Vars[i - 1], value);
MutexEx.Leave(p.Ctx.Mutex);
}
return(rc);
}
public static RC MemSetStr(Mem mem, byte[] z, int offset, int n, TEXTENCODE encode, Action <object> del)
{
Debug.Assert(mem.Ctx == null || MutexEx.Held(mem.Ctx.Mutex));
Debug.Assert((mem.Flags & MEM.RowSet) == 0);
// If z is a NULL pointer, set pMem to contain an SQL NULL.
if (z == null || z.Length < offset)
{
MemSetNull(mem);
return(RC.OK);
}
int limit = (mem.Ctx != null ? mem.Ctx.Limits[(int)LIMIT.LENGTH] : CORE_MAX_LENGTH); // Maximum allowed string or blob size
MEM flags = (encode == 0 ? MEM.Blob : MEM.Str); // New value for pMem->flags
int bytes = n; // New value for pMem->n
if (bytes < 0)
{
Debug.Assert(encode != 0);
if (encode == TEXTENCODE.UTF8)
{
for (bytes = 0; bytes <= limit && bytes < z.Length - offset && z[offset + bytes] != 0; bytes++)
{
}
}
else
{
for (bytes = 0; bytes <= limit && z[bytes + offset] != 0 || z[offset + bytes + 1] != 0; bytes += 2)
{
}
}
}
// The following block sets the new values of Mem.z and Mem.xDel. It also sets a flag in local variable "flags" to indicate the memory
// management (one of MEM_Dyn or MEM_Static).
Debug.Assert(encode == 0);
{
mem.Z = null;
mem.Z_ = C._alloc(n);
Buffer.BlockCopy(z, offset, mem.Z_, 0, n);
}
mem.N = bytes;
mem.Flags = MEM.Blob | MEM.Term;
mem.Encode = (encode == 0 ? TEXTENCODE.UTF8 : encode);
mem.Type = (encode == 0 ? TYPE.BLOB : TYPE.TEXT);
#if !OMIT_UTF16
if (mem.Encode != TEXTENCODE.UTF8 && MemHandleBom(mem) != 0)
{
return(RC.NOMEM);
}
#endif
return(bytes > limit ? RC.TOOBIG : RC.OK);
}
public static void MemMove(Mem to, Mem from)
{
Debug.Assert(from.Ctx == null || MutexEx.Held(from.Ctx.Mutex));
Debug.Assert(to.Ctx == null || MutexEx.Held(to.Ctx.Mutex));
Debug.Assert(from.Ctx == null || to.Ctx == null || from.Ctx == to.Ctx);
MemRelease(to);
from._memcpy(ref to);
from.Flags = MEM.Null;
from.Del = null;
from.Z = null;
from.Z_ = null;
}
public static RC TransferBindings(Vdbe from, Vdbe to)
{
Debug.Assert(to.Ctx == from.Ctx);
Debug.Assert(to.Vars.length == from.Vars.length);
MutexEx.Enter(to.Ctx.Mutex);
for (int i = 0; i < from.Vars.length; i++)
{
MemMove(to.Vars[i], from.Vars[i]);
}
MutexEx.Leave(to.Ctx.Mutex);
return(RC.OK);
}
public static VSystem FindVfs(string name)
{
VSystem vfs = null;
var mutex = MutexEx.Alloc(MutexEx.MUTEX.STATIC_MASTER);
MutexEx.Enter(mutex);
for (vfs = _vfsList; vfs != null && name != vfs.Name; vfs = vfs.Next)
{
}
MutexEx.Leave(mutex);
return(vfs);
}
public static void PostInitialize(MutexEx masterMutex)
{
MutexEx.Leave(_GlobalStatics.InitMutex);
// Go back under the static mutex and clean up the recursive mutex to prevent a resource leak.
MutexEx.Enter(masterMutex);
_GlobalStatics.InitMutexRefs--;
if (_GlobalStatics.InitMutexRefs <= 0)
{
Debug.Assert(_GlobalStatics.InitMutexRefs == 0);
MutexEx.Free(_GlobalStatics.InitMutex);
_GlobalStatics.InitMutex.Tag = null;
}
MutexEx.Leave(masterMutex);
}
public GlobalStatics(
bool memstat,
bool coreMutex,
bool fullMutex,
bool openUri,
int maxStrlen,
int lookasideSize,
int lookasides,
//sqlite3_mem_methods m,
//sqlite3_mutex_methods mutex,
//array_t<byte[]> heap,
//int minReq, int maxReq,
byte[][] scratch,
int scratchSize,
int scratchs,
bool sharedCacheEnabled,
bool isInit,
bool inProgress,
bool isMutexInit,
bool isMallocInit,
MutexEx initMutex,
int initMutexRefs,
Action<object, int, string> log,
object logArg,
bool localtimeFault
#if ENABLE_SQLLOG
, Action<object, TagBase, string, int> Sqllog,
object SqllogArg
#endif
)
{
Memstat = memstat;
CoreMutex = coreMutex;
OpenUri = openUri;
FullMutex = fullMutex;
MaxStrlen = maxStrlen;
LookasideSize = lookasideSize;
Lookasides = lookasides;
//m = m;
//mutex = mutex;
//Heap = heap;
//MaxReq = minReq; MinReq = maxReq;
Scratch = scratch;
ScratchSize = scratchSize;
Scratchs = scratchs;
SharedCacheEnabled = sharedCacheEnabled;
IsInit = isInit;
InProgress = inProgress;
IsMutexInit = isMutexInit;
IsMallocInit = isMallocInit;
InitMutex = initMutex;
InitMutexRefs = initMutexRefs;
Log = log;
LogArg = logArg;
LocaltimeFault = localtimeFault;
#if ENABLE_SQLLOG
Sqllog = sqllog;
SqllogArg = sqllogArg;
#endif
}
public static RC PreInitialize(out MutexEx masterMutex)
{
masterMutex = default(MutexEx);
// If SQLite is already completely initialized, then this call to sqlite3_initialize() should be a no-op. But the initialization
// must be complete. So isInit must not be set until the very end of this routine.
if (_GlobalStatics.IsInit) return RC.OK;
// The following is just a sanity check to make sure SQLite has been compiled correctly. It is important to run this code, but
// we don't want to run it too often and soak up CPU cycles for no reason. So we run it once during initialization.
#if !NDEBUG && !OMIT_FLOATING_POINT
// This section of code's only "output" is via assert() statements.
//ulong x = (((ulong)1)<<63)-1;
//double y;
//Debug.Assert(sizeof(ulong) == 8);
//Debug.Assert(sizeof(ulong) == sizeof(double));
//_memcpy<void>(&y, &x, 8);
//Debug.Assert(double.IsNaN(y));
#endif
RC rc;
#if ENABLE_SQLLOG
{
Init_Sqllog();
}
#endif
// Make sure the mutex subsystem is initialized. If unable to initialize the mutex subsystem, return early with the error.
// If the system is so sick that we are unable to allocate a mutex, there is not much SQLite is going to be able to do.
// The mutex subsystem must take care of serializing its own initialization.
rc = RC.OK; //MutexEx::Init();
if (rc != 0) return rc;
// Initialize the malloc() system and the recursive pInitMutex mutex. This operation is protected by the STATIC_MASTER mutex. Note that
// MutexAlloc() is called for a static mutex prior to initializing the malloc subsystem - this implies that the allocation of a static
// mutex must not require support from the malloc subsystem.
masterMutex = MutexEx.Alloc(MutexEx.MUTEX.STATIC_MASTER); // The main static mutex
MutexEx.Enter(masterMutex);
_GlobalStatics.IsMutexInit = true;
//if (!SysEx_GlobalStatics.IsMallocInit)
// rc = sqlite3MallocInit();
if (rc == RC.OK)
{
_GlobalStatics.IsMallocInit = true;
if (_GlobalStatics.InitMutex.Tag == null)
{
_GlobalStatics.InitMutex = MutexEx.Alloc(MutexEx.MUTEX.RECURSIVE);
if (_GlobalStatics.CoreMutex && _GlobalStatics.InitMutex.Tag == null)
rc = RC.NOMEM;
}
}
if (rc == RC.OK)
_GlobalStatics.InitMutexRefs++;
MutexEx.Leave(masterMutex);
// If rc is not SQLITE_OK at this point, then either the malloc subsystem could not be initialized or the system failed to allocate
// the pInitMutex mutex. Return an error in either case.
if (rc != RC.OK)
return rc;
// Do the rest of the initialization under the recursive mutex so that we will be able to handle recursive calls into
// sqlite3_initialize(). The recursive calls normally come through sqlite3_os_init() when it invokes sqlite3_vfs_register(), but other
// recursive calls might also be possible.
//
// IMPLEMENTATION-OF: R-00140-37445 SQLite automatically serializes calls to the xInit method, so the xInit method need not be threadsafe.
//
// The following mutex is what serializes access to the appdef pcache xInit methods. The sqlite3_pcache_methods.xInit() all is embedded in the
// call to sqlite3PcacheInitialize().
MutexEx.Enter(_GlobalStatics.InitMutex);
if (!_GlobalStatics.IsInit && !_GlobalStatics.InProgress)
{
_GlobalStatics.InProgress = true;
rc = VSystem.Initialize();
}
if (rc != RC.OK)
MutexEx.Leave(_GlobalStatics.InitMutex);
return rc;
}