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hvm.c
12549 lines (10537 loc) · 351 KB
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hvm.c
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/*
* The Virtual Machine
*
* Copyright 1999 Antonio Linares <alinares@fivetech.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING.txt. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site https://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
/*
* The following parts are Copyright of the individual authors.
*
* Copyright 1999-2001 Viktor Szakats (vszakats.net/harbour)
* hb_vmPushLongConst()
* hb_vmPushDoubleConst()
*
* Copyright 1999 Eddie Runia <eddie@runia.com>
* __dbgVMVarSGet()
* __dbgVMVarSList()
*
* See COPYING.txt for licensing terms.
*
*/
#define HB_STACK_PRELOAD
#include "hbvmopt.h"
#include "hbapi.h"
#include "hbstack.h"
#include "hbapierr.h"
#include "hbapicls.h"
#include "hbapidbg.h"
#include "hbapiitm.h"
#include "hbapilng.h"
#include "hbapirdd.h"
#include "hbapigt.h"
#include "hbapicdp.h"
#include "hbvm.h"
#include "hbxvm.h"
#include "hbpcode.h"
#include "hbset.h"
#include "hbdate.h"
#include "hbmath.h"
#include "hbdebug.ch"
#if defined( HB_MT_VM )
# include "hbthread.h"
#endif /* HB_MT_VM */
#include "hbmemory.ch"
#ifndef HB_NO_PROFILER
# include <time.h>
#endif
HB_FUNC_EXTERN( SYSINIT );
HB_FUNC_EXTERN( BREAK );
/* PCode functions */
/* Operators (mathematical / character / misc) */
static void hb_vmNegate( void ); /* negates (-) the latest value on the stack */
static void hb_vmInc( PHB_ITEM pItem ); /* increment the latest numeric value on the stack */
static void hb_vmDec( PHB_ITEM pItem ); /* decrements the latest numeric value on the stack */
static void hb_vmFuncPtr( void ); /* pushes a function address pointer. Removes the symbol from the satck */
static void hb_vmAddInt( PHB_ITEM pResult, HB_LONG lAdd ); /* add integer to given item */
static void hb_vmPlus( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* sums given values */
static void hb_vmMinus( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* substracts given values */
static void hb_vmMult( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* multiplies given values */
static void hb_vmDivide( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* divides the given values */
static void hb_vmModulus( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* calculates modulus given values */
static void hb_vmPower( PHB_ITEM pResult, PHB_ITEM pItem1, PHB_ITEM pItem2 ); /* power given values */
/* Operators (relational) */
static void hb_vmEqual( void ); /* checks if the two latest values on the stack are equal, removes both and leaves result */
static void hb_vmExactlyEqual( void ); /* checks if the two latest values on the stack are exactly equal, removes both and leaves result */
static void hb_vmNotEqual( void ); /* checks if the two latest values on the stack are not equal, removes both and leaves result */
static void hb_vmLess( void ); /* checks if the latest - 1 value is less than the latest, removes both and leaves result */
static void hb_vmLessEqual( void ); /* checks if the latest - 1 value is less than or equal the latest, removes both and leaves result */
static void hb_vmGreater( void ); /* checks if the latest - 1 value is greater than the latest, removes both and leaves result */
static void hb_vmGreaterEqual( void ); /* checks if the latest - 1 value is greater than or equal the latest, removes both and leaves result */
static void hb_vmInstring( void ); /* check whether string 1 is contained in string 2 */
static void hb_vmForTest( void ); /* test for end condition of for */
static void hb_vmSeqBlock( void ); /* set begin sequence WITH codeblock */
static void hb_vmWithObjectStart( void ); /* prepare WITH OBJECT block */
static void hb_vmEnumStart( int nVars, int nDescend ); /* prepare FOR EACH loop */
static void hb_vmEnumNext( void ); /* increment FOR EACH loop counter */
static void hb_vmEnumPrev( void ); /* decrement FOR EACH loop counter */
static void hb_vmEnumEnd( void ); /* rewind the stack after FOR EACH loop counter */
static const HB_BYTE * hb_vmSwitch( const HB_BYTE * pCode, HB_USHORT ); /* make a SWITCH statement */
/* Operators (logical) */
static void hb_vmNot( void ); /* changes the latest logical value on the stack */
static void hb_vmAnd( void ); /* performs the logical AND on the latest two values, removes them and leaves result on the stack */
static void hb_vmOr( void ); /* performs the logical OR on the latest two values, removes them and leaves result on the stack */
/* Array */
static void hb_vmArrayPush( void ); /* pushes an array element to the stack, removing the array and the index from the stack */
static void hb_vmArrayPushRef( void ); /* pushes a reference to an array element to the stack, removing the array and the index from the stack */
static void hb_vmArrayPop( void ); /* pops a value from the stack */
static void hb_vmArrayDim( HB_USHORT uiDimensions ); /* generates an uiDimensions Array and initialize those dimensions from the stack values */
static void hb_vmArrayGen( HB_SIZE nElements ); /* generates an nElements Array and fills it from the stack values */
static void hb_vmHashGen( HB_SIZE nElements ); /* generates an nElements Hash and fills it from the stack values */
/* macros */
static void hb_vmMacroDo( HB_USHORT uiArgSets ); /* execute function passing arguments set on HVM stack func( &var ) */
static void hb_vmMacroFunc( HB_USHORT uiArgSets ); /* execute procedure passing arguments set on HVM stack func( &var ) */
static void hb_vmMacroSend( HB_USHORT uiArgSets ); /* execute procedure passing arguments set on HVM stack func( &var ) */
static void hb_vmMacroArrayGen( HB_USHORT uiArgSets ); /* generate array from arguments set on HVM stack { &var } */
static void hb_vmMacroPushIndex( void ); /* push macro array index {...}[ &var ] */
/* Database */
static HB_ERRCODE hb_vmSelectWorkarea( PHB_ITEM, PHB_SYMB ); /* select the workarea using a given item or a substituted value */
static void hb_vmSwapAlias( void ); /* swaps items on the eval stack and pops the workarea number */
/* Execution */
static HARBOUR hb_vmDoBlock( void ); /* executes a codeblock */
static void hb_vmFrame( HB_USHORT usLocals, unsigned char ucParams ); /* increases the stack pointer for the amount of locals and params suplied */
static void hb_vmVFrame( HB_USHORT usLocals, unsigned char ucParams ); /* increases the stack pointer for the amount of locals and variable number of params suplied */
static void hb_vmSFrame( PHB_SYMB pSym ); /* sets the statics frame for a function */
static void hb_vmStatics( PHB_SYMB pSym, HB_USHORT uiStatics ); /* increases the global statics array to hold a PRG statics */
static void hb_vmInitThreadStatics( HB_USHORT uiCount, const HB_BYTE * pCode ); /* mark thread static variables */
static void hb_vmStaticsClear( void ); /* clear complex static variables */
static void hb_vmStaticsRelease( void ); /* release arrays with static variables */
/* Push */
static void hb_vmPushAlias( void ); /* pushes the current workarea number */
static void hb_vmPushAliasedField( PHB_SYMB ); /* pushes an aliased field on the eval stack */
static void hb_vmPushAliasedVar( PHB_SYMB ); /* pushes an aliased variable on the eval stack */
static void hb_vmPushBlock( const HB_BYTE * pCode, PHB_SYMB pSymbols, HB_SIZE nLen ); /* creates a codeblock */
static void hb_vmPushBlockShort( const HB_BYTE * pCode, PHB_SYMB pSymbols, HB_SIZE nLen ); /* creates a codeblock */
static void hb_vmPushMacroBlock( const HB_BYTE * pCode, HB_SIZE nSize, HB_USHORT usParams ); /* creates a macro-compiled codeblock */
static void hb_vmPushDoubleConst( double dNumber, int iWidth, int iDec ); /* Pushes a double constant (pcode) */
static void hb_vmPushLocal( int iLocal ); /* pushes the containts of a local onto the stack */
static void hb_vmPushLocalByRef( int iLocal ); /* pushes a local by refrence onto the stack */
static void hb_vmPushHBLong( HB_MAXINT nNumber ); /* pushes a HB_MAXINT number onto the stack */
#if ! defined( HB_LONG_LONG_OFF )
static void hb_vmPushLongLongConst( HB_LONGLONG lNumber ); /* Pushes a long long constant (pcode) */
#endif
#if HB_VMINT_MAX >= INT32_MAX
static void hb_vmPushIntegerConst( int iNumber ); /* Pushes a int constant (pcode) */
#else
static void hb_vmPushLongConst( long lNumber ); /* Pushes a long constant (pcode) */
#endif
static void hb_vmPushStatic( HB_USHORT uiStatic ); /* pushes the containts of a static onto the stack */
static void hb_vmPushStaticByRef( HB_USHORT uiStatic ); /* pushes a static by refrence onto the stack */
static void hb_vmPushVariable( PHB_SYMB pVarSymb ); /* pushes undeclared variable */
static void hb_vmPushObjectVarRef( void ); /* pushes reference to object variable */
static void hb_vmPushVParams( void ); /* pushes variable parameters */
static void hb_vmPushAParams( void ); /* pushes array items */
static void hb_vmPushUnRef( void ); /* push the unreferenced latest value on the stack */
static void hb_vmDuplicate( void ); /* duplicates the latest value on the stack */
static void hb_vmDuplUnRef( void ); /* duplicates the latest value on the stack and unref the source one */
static void hb_vmSwap( int iCount ); /* swap bCount+1 time two items on HVM stack starting from the most top one */
/* Pop */
static HB_BOOL hb_vmPopLogical( void ); /* pops the stack latest value and returns its logical value */
static void hb_vmPopAlias( void ); /* pops the workarea number form the eval stack */
static void hb_vmPopAliasedField( PHB_SYMB ); /* pops an aliased field from the eval stack*/
static void hb_vmPopAliasedVar( PHB_SYMB ); /* pops an aliased variable from the eval stack*/
static void hb_vmPopLocal( int iLocal ); /* pops the stack latest value onto a local */
static void hb_vmPopStatic( HB_USHORT uiStatic ); /* pops the stack latest value onto a static */
/* misc */
static void hb_vmDoInitStatics( void ); /* executes all _INITSTATICS functions */
static void hb_vmDoInitFunctions( HB_BOOL ); /* executes all defined PRGs INIT functions */
static void hb_vmDoExitFunctions( void ); /* executes all defined PRGs EXIT functions */
static void hb_vmReleaseLocalSymbols( void ); /* releases the memory of the local symbols linked list */
static void hb_vmMsgIndexReference( PHB_ITEM pRefer, PHB_ITEM pObject, PHB_ITEM pIndex ); /* create object index reference */
#ifndef HB_NO_DEBUG
static void hb_vmLocalName( HB_USHORT uiLocal, const char * szLocalName ); /* locals and parameters index and name information for the debugger */
static void hb_vmStaticName( HB_BYTE bIsGlobal, HB_USHORT uiStatic, const char * szStaticName ); /* statics vars information for the debugger */
static void hb_vmModuleName( const char * szModuleName ); /* PRG and function name information for the debugger */
static void hb_vmDebugEntry( int nMode, int nLine, const char * szName, int nIndex, PHB_ITEM pFrame );
static void hb_vmDebuggerExit( HB_BOOL fRemove ); /* shuts down the debugger */
static void hb_vmDebuggerShowLine( HB_USHORT uiLine ); /* makes the debugger shows a specific source code line */
static void hb_vmDebuggerEndProc( void ); /* notifies the debugger for an endproc */
static PHB_DYNS s_pDynsDbgEntry = NULL; /* Cached __DBGENTRY symbol */
static HB_DBGENTRY_FUNC s_pFunDbgEntry; /* C level debugger entry */
#endif
static HB_BOOL s_fInternalsEnabled = HB_TRUE;
#if defined( HB_MT_VM )
static int volatile hb_vmThreadRequest = 0;
static void hb_vmRequestTest( void );
static PHB_ITEM s_pSymbolsMtx = NULL;
static HB_CRITICAL_NEW( s_atInitMtx );
# define HB_ATINIT_LOCK() hb_threadEnterCriticalSection( &s_atInitMtx )
# define HB_ATINIT_UNLOCK() hb_threadLeaveCriticalSection( &s_atInitMtx )
# define HB_TASK_SHEDULER() HB_THREAD_SHEDULER()
#else
# define HB_ATINIT_LOCK()
# define HB_ATINIT_UNLOCK()
# define HB_TASK_SHEDULER()
#endif /* HB_MT_VM */
#ifndef HB_NO_PROFILER
static HB_ULONG hb_ulOpcodesCalls[ HB_P_LAST_PCODE ]; /* array to profile opcodes calls */
static HB_ULONG hb_ulOpcodesTime[ HB_P_LAST_PCODE ]; /* array to profile opcodes consumed time */
static HB_BOOL hb_bProfiler = HB_FALSE; /* profiler status is off */
#endif
#if defined( HB_PRG_TRACE )
static HB_BOOL hb_bTracePrgCalls = HB_FALSE; /* prg tracing is off */
# define HB_TRACE_PRG( _TRMSG_ ) if( hb_bTracePrgCalls ) HB_TRACE( HB_TR_ALWAYS, _TRMSG_ )
#else
# define HB_TRACE_PRG( _TRMSG_ )
#endif
static const char * s_vm_pszLinkedMain = NULL; /* name of startup function set by linker */
/* virtual machine state */
HB_SYMB hb_symEval = { "EVAL", { HB_FS_PUBLIC }, { hb_vmDoBlock }, NULL }; /* symbol to evaluate codeblocks */
static HB_SYMB s_symBreak = { "BREAK", { HB_FS_PUBLIC }, { HB_FUNCNAME( BREAK ) }, NULL }; /* symbol to generate break */
static PHB_ITEM s_breakBlock = NULL;
static HB_BOOL s_fHVMActive = HB_FALSE; /* is HVM ready for PCODE executing */
static HB_BOOL s_fDoExitProc = HB_TRUE; /* execute EXIT procedures */
static int s_nErrorLevel = 0; /* application exit errorlevel */
static PHB_SYMB s_pSymStart = NULL; /* start symbol of the application. MAIN() is not required */
static PHB_SYMBOLS s_pSymbols = NULL; /* to hold a linked list of all different modules symbol tables */
static HB_ULONG s_ulFreeSymbols = 0;/* number of free module symbols */
static void * s_hDynLibID = NULL; /* unique identifer to mark symbol tables loaded from dynamic libraries */
static HB_BOOL s_fCloneSym = HB_FALSE;/* clone registered symbol tables */
/* main VM thread stack ID */
static void * s_main_thread = NULL;
/* SEQUENCE envelope items position from stack top active
*/
#define HB_RECOVER_STATE -1
#define HB_RECOVER_VALUE -2
#define HB_SEQ_CANRECOVER 64
#define HB_SEQ_DOALWAYS 128
static PHB_FUNC_LIST s_InitFunctions = NULL;
static PHB_FUNC_LIST s_ExitFunctions = NULL;
static PHB_FUNC_LIST s_QuitFunctions = NULL;
static PHB_ITEM hb_breakBlock( void )
{
if( s_breakBlock == NULL )
{
static const HB_BYTE s_pCode[ 8 ] = {
HB_P_PUSHFUNCSYM, 0, 0, /* BREAK */
HB_P_PUSHLOCALNEAR, 1, /* oErr */
HB_P_FUNCTIONSHORT, 1,
HB_P_ENDBLOCK };
s_breakBlock = hb_itemNew( NULL );
s_breakBlock->item.asBlock.value =
hb_codeblockNew( s_pCode, /* pcode buffer */
0, /* number of referenced local variables */
NULL, /* table with referenced local variables */
&s_symBreak,
sizeof( s_pCode ) );
s_breakBlock->type = HB_IT_BLOCK;
s_breakBlock->item.asBlock.paramcnt = 1;
s_breakBlock->item.asBlock.lineno = 0;
s_breakBlock->item.asBlock.hclass = 0;
s_breakBlock->item.asBlock.method = 0;
}
return s_breakBlock;
}
static void hb_breakBlockRelease( void )
{
if( s_breakBlock != NULL )
{
hb_itemRelease( s_breakBlock );
s_breakBlock = NULL;
}
}
static void hb_vmAddModuleFunction( PHB_FUNC_LIST * pLstPtr, HB_INIT_FUNC pFunc, void * cargo )
{
PHB_FUNC_LIST pLst = ( PHB_FUNC_LIST ) hb_xgrab( sizeof( HB_FUNC_LIST ) );
pLst->pFunc = pFunc;
pLst->cargo = cargo;
pLst->hDynLib = s_hDynLibID;
HB_ATINIT_LOCK();
pLst->pNext = *pLstPtr;
*pLstPtr = pLst;
HB_ATINIT_UNLOCK();
}
static void hb_vmDoModuleFunctions( PHB_FUNC_LIST * pLstPtr )
{
while( *pLstPtr )
{
PHB_FUNC_LIST pLst = *pLstPtr;
*pLstPtr = pLst->pNext;
pLst->pFunc( pLst->cargo );
hb_xfree( pLst );
}
}
static void hb_vmDoModuleLibFunctions( PHB_FUNC_LIST * pLstPtr, void * hDynLib )
{
while( *pLstPtr )
{
PHB_FUNC_LIST pLst = *pLstPtr;
if( pLst->hDynLib == hDynLib )
{
*pLstPtr = pLst->pNext;
pLst->pFunc( pLst->cargo );
hb_xfree( pLst );
}
else
pLstPtr = &pLst->pNext;
}
}
static void hb_vmDoModuleSetLibID( PHB_FUNC_LIST pLst, void * hDynLib, void * hNewDynLib )
{
while( pLst )
{
if( pLst->hDynLib == hDynLib )
pLst->hDynLib = hNewDynLib;
pLst = pLst->pNext;
}
}
static void hb_vmCleanModuleFunctions( void )
{
PHB_FUNC_LIST pLst;
while( s_InitFunctions )
{
pLst = s_InitFunctions;
s_InitFunctions = pLst->pNext;
hb_xfree( pLst );
}
while( s_ExitFunctions )
{
pLst = s_ExitFunctions;
s_ExitFunctions = pLst->pNext;
hb_xfree( pLst );
}
while( s_QuitFunctions )
{
pLst = s_QuitFunctions;
s_QuitFunctions = pLst->pNext;
hb_xfree( pLst );
}
}
void hb_vmAtInit( HB_INIT_FUNC pFunc, void * cargo )
{
hb_vmAddModuleFunction( &s_InitFunctions, pFunc, cargo );
}
void hb_vmAtExit( HB_INIT_FUNC pFunc, void * cargo )
{
hb_vmAddModuleFunction( &s_ExitFunctions, pFunc, cargo );
}
void hb_vmAtQuit( HB_INIT_FUNC pFunc, void * cargo )
{
hb_vmAddModuleFunction( &s_QuitFunctions, pFunc, cargo );
}
static void hb_vmDoModuleInitFunctions( void )
{
hb_vmDoModuleFunctions( &s_InitFunctions );
}
static void hb_vmDoModuleExitFunctions( void )
{
hb_vmDoModuleFunctions( &s_ExitFunctions );
}
static void hb_vmDoModuleQuitFunctions( void )
{
hb_vmDoModuleFunctions( &s_QuitFunctions );
}
/* call __HBVMINIT function to initialize GETLIST public variable
* and set ErrorBlock() by ErrorSys() function
*/
static void hb_vmDoInitHVM( void )
{
PHB_DYNS pDynSym = hb_dynsymFind( "__HBVMINIT" );
if( pDynSym && pDynSym->pSymbol->value.pFunPtr )
{
hb_vmPushSymbol( pDynSym->pSymbol );
hb_vmPushNil();
hb_vmProc( 0 );
}
}
/* call __SetHelpK() if HELP() function is linked */
static void hb_vmDoInitHelp( void )
{
PHB_DYNS pDynSym = hb_dynsymFind( "HELP" );
if( pDynSym && pDynSym->pSymbol->value.pFunPtr )
{
pDynSym = hb_dynsymFind( "__SETHELPK" );
if( pDynSym && pDynSym->pSymbol->value.pFunPtr )
{
hb_vmPushSymbol( pDynSym->pSymbol );
hb_vmPushNil();
hb_vmProc( 0 );
}
}
}
#if ! defined( HB_MT_VM )
HB_BOOL hb_vmIsMt( void ) { return HB_FALSE; }
HB_BOOL hb_vmThreadIsMain( void * Cargo ) { HB_SYMBOL_UNUSED( Cargo ); return s_fHVMActive; }
void hb_vmLock( void ) {}
void hb_vmUnlock( void ) {}
HB_BOOL hb_vmSuspendThreads( HB_BOOL fWait ) { HB_SYMBOL_UNUSED( fWait ); return HB_TRUE; }
void hb_vmResumeThreads( void ) {}
/*
HB_BOOL hb_vmThreadRegister( void * Cargo ) { HB_SYMBOL_UNUSED( Cargo ); return HB_FALSE; }
void hb_vmThreadRelease( void * Cargo )
{
PHB_THREADSTATE pState = ( PHB_THREADSTATE ) Cargo;
PHB_ITEM pThItm = pState->pThItm;
pState->pThItm = NULL;
if( pThItm )
hb_itemRelease( pThItm );
}
*/
#else
static HB_CRITICAL_NEW( s_vmMtx );
static HB_COND_NEW( s_vmCond );
/* number of allocated HVM stacks */
static int volatile s_iStackCount = 0;
/* number of running HVM threads */
static int volatile s_iRunningCount = 0;
/* active HVM stacks list */
static PHB_THREADSTATE s_vmStackLst = NULL;
/* thread number */
static HB_THREAD_NO s_threadNo = 0;
# define HB_THREQUEST_STOP 1
# define HB_THREQUEST_QUIT 2
# define HB_VM_LOCK() hb_threadEnterCriticalSection( &s_vmMtx )
# define HB_VM_UNLOCK() hb_threadLeaveCriticalSection( &s_vmMtx )
HB_BOOL hb_vmIsMt( void ) { return HB_TRUE; }
static void hb_vmRequestTest( void )
{
HB_VM_LOCK();
s_iRunningCount--;
for( ;; )
{
if( hb_vmThreadRequest & HB_THREQUEST_QUIT )
{
HB_STACK_TLS_PRELOAD
if( ! hb_stackQuitState() )
{
hb_stackSetQuitState( HB_TRUE );
hb_stackSetActionRequest( HB_QUIT_REQUESTED );
}
}
if( hb_vmThreadRequest & HB_THREQUEST_STOP )
{
hb_threadCondBroadcast( &s_vmCond );
hb_threadCondWait( &s_vmCond, &s_vmMtx );
}
else
break;
}
s_iRunningCount++;
HB_VM_UNLOCK();
}
/* unlock VM, allow GC and other exclusive single task code execution */
void hb_vmUnlock( void )
{
if( s_fHVMActive )
{
HB_STACK_TLS_PRELOAD
if( hb_stackId() ) /* check if thread has associated HVM stack */
{
if( hb_stackUnlock() == 1 )
{
HB_VM_LOCK();
s_iRunningCount--;
if( hb_vmThreadRequest )
{
if( hb_vmThreadRequest & HB_THREQUEST_QUIT )
{
if( ! hb_stackQuitState() )
{
hb_stackSetQuitState( HB_TRUE );
hb_stackSetActionRequest( HB_QUIT_REQUESTED );
}
}
hb_threadCondBroadcast( &s_vmCond );
}
HB_VM_UNLOCK();
}
}
HB_TASK_SHEDULER();
}
}
/* lock VM blocking GC and other exclusive single task code execution */
void hb_vmLock( void )
{
if( s_fHVMActive )
{
HB_STACK_TLS_PRELOAD
if( hb_stackId() ) /* check if thread has associated HVM stack */
{
if( hb_stackLock() == 0 )
{
HB_VM_LOCK();
for( ;; )
{
if( hb_vmThreadRequest & HB_THREQUEST_QUIT )
{
if( ! hb_stackQuitState() )
{
hb_stackSetQuitState( HB_TRUE );
hb_stackSetActionRequest( HB_QUIT_REQUESTED );
}
}
if( hb_vmThreadRequest & HB_THREQUEST_STOP )
hb_threadCondWait( &s_vmCond, &s_vmMtx );
else
break;
}
s_iRunningCount++;
HB_VM_UNLOCK();
}
}
}
}
void hb_vmLockForce( void )
{
if( s_fHVMActive )
{
HB_STACK_TLS_PRELOAD
if( hb_stackId() ) /* check if thread has associated HVM stack */
{
if( hb_stackLock() == 0 )
{
HB_VM_LOCK();
if( hb_vmThreadRequest & HB_THREQUEST_QUIT )
{
if( ! hb_stackQuitState() )
{
hb_stackSetQuitState( HB_TRUE );
hb_stackSetActionRequest( HB_QUIT_REQUESTED );
}
}
s_iRunningCount++;
HB_VM_UNLOCK();
}
}
}
}
/* (try to) stop all threads except current one */
HB_BOOL hb_vmSuspendThreads( HB_BOOL fWait )
{
HB_VM_LOCK();
if( ( hb_vmThreadRequest & ( HB_THREQUEST_STOP | HB_THREQUEST_QUIT ) ) == 0 )
{
hb_vmThreadRequest |= HB_THREQUEST_STOP;
--s_iRunningCount;
for( ;; )
{
if( s_iRunningCount <= 0 )
{
++s_iRunningCount;
return HB_TRUE;
}
if( ! fWait )
break;
hb_threadCondWait( &s_vmCond, &s_vmMtx );
if( hb_vmThreadRequest & HB_THREQUEST_QUIT )
break;
}
++s_iRunningCount;
hb_vmThreadRequest &= ~HB_THREQUEST_STOP;
hb_threadCondBroadcast( &s_vmCond );
}
HB_VM_UNLOCK();
return HB_FALSE;
}
/* unblock execution of threads stopped by hb_vmSuspendThreads() */
void hb_vmResumeThreads( void )
{
hb_vmThreadRequest &= ~HB_THREQUEST_STOP;
hb_threadCondBroadcast( &s_vmCond );
HB_VM_UNLOCK();
}
/* send QUIT request to all threads except current one
* and wait for their termination,
* should be called only by main HVM thread
*/
void hb_vmTerminateThreads( void )
{
HB_STACK_TLS_PRELOAD
if( s_main_thread == hb_stackId() )
{
HB_VM_LOCK();
hb_vmThreadRequest |= HB_THREQUEST_QUIT;
--s_iRunningCount;
hb_threadMutexUnlockAll();
hb_threadMutexUnsubscribeAll();
hb_threadCondBroadcast( &s_vmCond );
while( s_iStackCount > 1 )
hb_threadCondWait( &s_vmCond, &s_vmMtx );
++s_iRunningCount;
/* hb_vmThreadRequest &= ~HB_THREQUEST_QUIT; */
hb_vmThreadRequest = 0;
HB_VM_UNLOCK();
}
}
/* wait for all threads to terminate
* should be called only by main HVM thread
*/
void hb_vmWaitForThreads( void )
{
HB_STACK_TLS_PRELOAD
if( s_main_thread == hb_stackId() )
{
HB_VM_LOCK();
--s_iRunningCount;
if( hb_vmThreadRequest )
hb_threadCondBroadcast( &s_vmCond );
while( s_iStackCount > 1 )
hb_threadCondWait( &s_vmCond, &s_vmMtx );
++s_iRunningCount;
HB_VM_UNLOCK();
}
}
void * hb_vmThreadState( void )
{
HB_STACK_TLS_PRELOAD
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadState()" ) );
return hb_stackId() ? hb_stackList() : NULL;
}
HB_BOOL hb_vmThreadIsMain( void * Cargo )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadIsMain(%p)", Cargo ) );
if( ! s_fHVMActive || s_main_thread == NULL )
return HB_FALSE;
else if( Cargo )
return s_main_thread == ( ( PHB_THREADSTATE ) Cargo )->pStackId;
else
{
HB_STACK_TLS_PRELOAD
return s_main_thread == hb_stackId();
}
}
static void hb_vmStackAdd( PHB_THREADSTATE pState )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_vmStackAdd(%p)", pState ) );
if( ! pState->pPrev )
{
if( s_vmStackLst )
{
pState->pNext = s_vmStackLst;
pState->pPrev = s_vmStackLst->pPrev;
pState->pPrev->pNext = pState;
s_vmStackLst->pPrev = pState;
}
else
{
s_vmStackLst = pState->pNext = pState->pPrev = pState;
}
s_iStackCount++;
}
if( pState->th_no == 0 )
pState->th_no = ++s_threadNo;
}
static PHB_ITEM hb_vmStackDel( PHB_THREADSTATE pState, HB_BOOL fCounter )
{
PHB_ITEM pThItm;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmStackDel(%p,%d)", pState, ( int ) fCounter ) );
pState->fActive = HB_FALSE;
pState->pStackId = NULL;
pState->fFinished = HB_TRUE;
if( pState->pPrev )
{
pState->pPrev->pNext = pState->pNext;
pState->pNext->pPrev = pState->pPrev;
if( s_vmStackLst == pState )
{
s_vmStackLst = pState->pNext;
if( s_vmStackLst == pState )
s_vmStackLst = NULL;
}
pState->pPrev = pState->pNext = NULL;
if( fCounter )
s_iStackCount--;
}
/* NOTE: releasing pThItm may force pState freeing if parent
* thread does not keep thread pointer item. So it's
* important to not access it later. [druzus]
*/
pThItm = pState->pThItm;
pState->pThItm = NULL;
return pThItm;
}
static void hb_vmStackInit( PHB_THREADSTATE pState )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_vmStackInit(%p)", pState ) );
hb_stackInit(); /* initialize HVM thread stack */
HB_VM_LOCK();
{
HB_STACK_TLS_PRELOAD
hb_stackUnlock();
pState->pStackId = hb_stackId();
hb_stackListSet( ( void * ) ( pState ) );
pState->fActive = HB_TRUE;
hb_vmStackAdd( pState );
}
HB_VM_UNLOCK();
}
static void hb_vmStackRelease( void )
{
HB_STACK_TLS_PRELOAD
HB_BOOL fLocked;
PHB_ITEM pThItm;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmStackRelease()" ) );
HB_VM_LOCK();
fLocked = hb_stackUnlock() == 1;
pThItm = hb_vmStackDel( ( PHB_THREADSTATE ) hb_stackList(), HB_FALSE );
HB_VM_UNLOCK();
/* NOTE: releasing pThItm may force pState freeing if parent
* thread does not keep thread pointer item. So it's
* important to not access it later. [druzus]
*/
if( pThItm )
hb_itemRelease( pThItm );
hb_setRelease( hb_stackSetStruct() );
hb_stackFree();
hb_threadMutexUnlockAll();
HB_VM_LOCK();
if( fLocked )
s_iRunningCount--;
s_iStackCount--;
hb_threadCondBroadcast( &s_vmCond );
HB_VM_UNLOCK();
}
HB_BOOL hb_vmThreadRegister( void * Cargo )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadRegister(%p)", Cargo ) );
HB_VM_LOCK();
hb_vmStackAdd( ( PHB_THREADSTATE ) Cargo );
HB_VM_UNLOCK();
return HB_TRUE;
}
void hb_vmThreadRelease( void * Cargo )
{
PHB_ITEM pThItm;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadRelease(%p)", Cargo ) );
HB_VM_LOCK();
pThItm = hb_vmStackDel( ( PHB_THREADSTATE ) Cargo, HB_TRUE );
hb_threadCondBroadcast( &s_vmCond );
HB_VM_UNLOCK();
if( pThItm )
hb_itemRelease( pThItm );
}
/* thread entry point */
void hb_vmThreadInit( void * Cargo )
{
PHB_THREADSTATE pState;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadInit(%p)", Cargo ) );
pState = ( PHB_THREADSTATE ) Cargo;
if( ! pState )
pState = hb_threadStateNew();
hb_vmStackInit( pState ); /* initialize HVM thread stack */
hb_vmLock();
{
HB_STACK_TLS_PRELOAD
hb_cdpSelectID( pState->pszCDP );
hb_langSelectID( pState->pszLang );
hb_vmSetI18N( pState->pI18N );
pState->pI18N = NULL;
if( pState->pSet )
{
memcpy( hb_stackSetStruct(), pState->pSet, sizeof( HB_SET_STRUCT ) );
hb_xfree( pState->pSet );
pState->pSet = NULL;
}
else
hb_setInitialize( hb_stackSetStruct() );
hb_gtAttach( pState->hGT );
pState->hGT = NULL;
if( pState->pszDefRDD )
hb_stackRDD()->szDefaultRDD = pState->pszDefRDD;
if( s_fHVMActive )
{
/* call __HBVMINIT function to initialize GETLIST public variable
* and set ErrorBlock() by ErrorSys() function
*/
hb_vmDoInitHVM();
}
if( pState->pMemvars )
{
hb_memvarRestoreFromArray( pState->pMemvars );
hb_itemRelease( pState->pMemvars );
pState->pMemvars = NULL;
}
}
}
/* thread leave point */
void hb_vmThreadQuit( void )
{
HB_STACK_TLS_PRELOAD
PHB_THREADSTATE pState;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadQuit()" ) );
hb_stackSetQuitState( HB_TRUE );
hb_stackSetActionRequest( 0 );
pState = ( PHB_THREADSTATE ) hb_stackList();
{
PHB_ITEM pReturn = hb_stackReturnItem();
if( HB_IS_BYREF( pReturn ) )
pReturn = hb_itemUnRef( pReturn );
if( ! pState->pResult )
{
pState->pResult = hb_itemNew( pReturn );
hb_gcUnlock( pState->pResult );
}
else
hb_itemCopy( pState->pResult, pReturn );
}
hb_itemClear( hb_stackReturnItem() );
hb_stackSetActionRequest( 0 );
hb_rddCloseAll(); /* close all workareas */
hb_stackRemove( 1 ); /* clear stack items, leave only initial symbol item */
hb_memvarsClear( HB_TRUE ); /* clear all PUBLIC (and PRIVATE if any) variables */
hb_vmSetI18N( NULL ); /* remove i18n translation table */
#ifndef HB_NO_DEBUG
hb_vmDebuggerExit( HB_FALSE ); /* deactivate debugger */
#endif
hb_gtRelease( NULL );
hb_vmStackRelease(); /* release HVM stack and remove it from linked HVM stacks list */
}
/* send QUIT request to given thread */
void hb_vmThreadQuitRequest( void * Cargo )
{
PHB_THREADSTATE pState;
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadQuitRequest(%p)", Cargo ) );
pState = ( PHB_THREADSTATE ) Cargo;
HB_VM_LOCK();
if( pState->pStackId && pState->fActive )
hb_stackIdSetActionRequest( pState->pStackId, HB_QUIT_REQUESTED );
HB_VM_UNLOCK();
}
#endif /* HB_MT_VM */
PHB_ITEM hb_vmThreadStart( HB_ULONG ulAttr, PHB_CARGO_FUNC pFunc, void * cargo )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_vmThreadStart(%lu,%p,%p)", ulAttr, pFunc, cargo ) );