src/scriptvm/ScriptVM.cpp

/*
 * Copyright (c) 2014 - 2016 Christian Schoenebeck
 *
 * http://www.linuxsampler.org
 *
 * This file is part of LinuxSampler and released under the same terms.
 * See README file for details.
 */

#include "ScriptVM.h"

#include <string.h>
#include <assert.h>
#include "../common/global_private.h"
#include "tree.h"
#include "CoreVMFunctions.h"
#include "editor/NkspScanner.h"

#define DEBUG_SCRIPTVM_CORE 0

int InstrScript_parse(LinuxSampler::ParserContext*);

namespace LinuxSampler {

    static void _printIndents(int n) {
        for (int i = 0; i < n; ++i) printf("  ");
        fflush(stdout);
    }

    static int _requiredMaxStackSizeFor(Statement* statement, int depth = 0) {
        if (!statement) return 1;

        switch (statement->statementType()) {
            case STMT_LEAF:
                #if DEBUG_SCRIPTVM_CORE
                _printIndents(depth);
                printf("-> STMT_LEAF\n");
                #endif
                return 1;

            case STMT_LIST: {
                #if DEBUG_SCRIPTVM_CORE
                _printIndents(depth);
                printf("-> STMT_LIST\n");
                #endif
                Statements* stmts = (Statements*) statement;
                int max = 0;
                for (int i = 0; stmts->statement(i); ++i) {
                    int size = _requiredMaxStackSizeFor( stmts->statement(i), depth+1 );
                    if (max < size) max = size;
                }
                return max + 1;
            }

            case STMT_BRANCH: {
                #if DEBUG_SCRIPTVM_CORE
                _printIndents(depth);
                printf("-> STMT_BRANCH\n");
                #endif
                BranchStatement* branchStmt = (BranchStatement*) statement;
                int max = 0;
                for (int i = 0; branchStmt->branch(i); ++i) {
                    int size = _requiredMaxStackSizeFor( branchStmt->branch(i), depth+1 );
                    if (max < size) max = size;
                }
                return max + 1;
            }

            case STMT_LOOP: {
                #if DEBUG_SCRIPTVM_CORE
                _printIndents(depth);
                printf("-> STMT_LOOP\n");
                #endif
                While* whileStmt = (While*) statement;
                if (whileStmt->statements())
                    return _requiredMaxStackSizeFor( whileStmt->statements() ) + 1;
                else
                    return 1;
            }
        }

        return 1; // actually just to avoid compiler warning
    }

    static int _requiredMaxStackSizeFor(EventHandlers* handlers) {
        int max = 1;
        for (int i = 0; i < handlers->size(); ++i) {
            int size = _requiredMaxStackSizeFor(handlers->eventHandler(i));
            if (max < size) max = size;
        }
        return max;
    }

    ScriptVM::ScriptVM() : m_eventHandler(NULL), m_parserContext(NULL) {
        m_fnMessage = new CoreVMFunction_message;
        m_fnExit = new CoreVMFunction_exit;
        m_fnWait = new CoreVMFunction_wait(this);
        m_fnAbs = new CoreVMFunction_abs;
        m_fnRandom = new CoreVMFunction_random;
        m_fnNumElements = new CoreVMFunction_num_elements;
    }

    ScriptVM::~ScriptVM() {
        delete m_fnMessage;
        delete m_fnExit;
        delete m_fnWait;
        delete m_fnAbs;
        delete m_fnRandom;
        delete m_fnNumElements;
    }

    VMParserContext* ScriptVM::loadScript(const String& s) {
        std::istringstream iss(s);
        return loadScript(&iss);
    }
    
    VMParserContext* ScriptVM::loadScript(std::istream* is) {
        ParserContext* context = new ParserContext(this);
        //printf("parserCtx=0x%lx\n", (uint64_t)context);

        context->registerBuiltInConstIntVariables( builtInConstIntVariables() );
        context->registerBuiltInIntVariables( builtInIntVariables() );
        context->registerBuiltInIntArrayVariables( builtInIntArrayVariables() );

        context->createScanner(is);

        InstrScript_parse(context);
        dmsg(2,("Allocating %ld bytes of global int VM memory.\n", long(context->globalIntVarCount * sizeof(int))));
        dmsg(2,("Allocating %d of global VM string variables.\n", context->globalStrVarCount));
        if (!context->globalIntMemory)
            context->globalIntMemory = new ArrayList<int>();
        if (!context->globalStrMemory)
            context->globalStrMemory = new ArrayList<String>();
        context->globalIntMemory->resize(context->globalIntVarCount);
        memset(&((*context->globalIntMemory)[0]), 0, context->globalIntVarCount * sizeof(int));
        
        context->globalStrMemory->resize(context->globalStrVarCount);

        context->destroyScanner();

        return context;
    }

    void ScriptVM::dumpParsedScript(VMParserContext* context) {
        ParserContext* ctx = dynamic_cast<ParserContext*>(context);
        if (!ctx) {
            std::cerr << "No VM context. So nothing to dump.\n";
            return;
        }
        if (!ctx->handlers) {
            std::cerr << "No event handlers defined in script. So nothing to dump.\n";
            return;
        }
        if (!ctx->globalIntMemory) {
            std::cerr << "Internal error: no global memory assigend to script VM.\n";
            return;
        }
        ctx->handlers->dump();
    }

    VMExecContext* ScriptVM::createExecContext(VMParserContext* parserContext) {
        ParserContext* parserCtx = dynamic_cast<ParserContext*>(parserContext);
        ExecContext* execCtx = new ExecContext();
        
        if (parserCtx->requiredMaxStackSize < 0) {
             parserCtx->requiredMaxStackSize =
                _requiredMaxStackSizeFor(&*parserCtx->handlers);
        }
        execCtx->stack.resize(parserCtx->requiredMaxStackSize);
        dmsg(2,("Created VM exec context with %ld bytes VM stack size.\n",
                long(parserCtx->requiredMaxStackSize * sizeof(ExecContext::StackFrame))));
        //printf("execCtx=0x%lx\n", (uint64_t)execCtx);
        const int polySize = parserCtx->polyphonicIntVarCount;
        execCtx->polyphonicIntMemory.resize(polySize);
        memset(&execCtx->polyphonicIntMemory[0], 0, polySize * sizeof(int));

        dmsg(2,("Allocated %ld bytes polyphonic memory.\n", long(polySize * sizeof(int))));
        return execCtx;
    }

    std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(const String& s) {
        std::istringstream iss(s);
        return syntaxHighlighting(&iss);
    }

    std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(std::istream* is) {
        NkspScanner scanner(is);
        std::vector<SourceToken> tokens = scanner.tokens();
        std::vector<VMSourceToken> result;
        result.resize(tokens.size());
        for (int i = 0; i < tokens.size(); ++i) {
            SourceToken* st = new SourceToken;
            *st = tokens[i];
            result[i] = VMSourceToken(st);
        }
        return result;
    }

    VMFunction* ScriptVM::functionByName(const String& name) {
        if (name == "message") return m_fnMessage;
        else if (name == "exit") return m_fnExit;
        else if (name == "wait") return m_fnWait;
        else if (name == "abs") return m_fnAbs;
        else if (name == "random") return m_fnRandom;
        else if (name == "num_elements") return m_fnNumElements;
        return NULL;
    }

    std::map<String,VMIntRelPtr*> ScriptVM::builtInIntVariables() {
        return std::map<String,VMIntRelPtr*>();
    }

    std::map<String,VMInt8Array*> ScriptVM::builtInIntArrayVariables() {
        return std::map<String,VMInt8Array*>();
    }

    std::map<String,int> ScriptVM::builtInConstIntVariables() {
        return std::map<String,int>();
    }

    VMEventHandler* ScriptVM::currentVMEventHandler() {
        return m_eventHandler;
    }

    VMParserContext* ScriptVM::currentVMParserContext() {
        return m_parserContext;
    }

    VMExecContext* ScriptVM::currentVMExecContext() {
        if (!m_parserContext) return NULL;
        return m_parserContext->execContext;
    }

    VMExecStatus_t ScriptVM::exec(VMParserContext* parserContext, VMExecContext* execContex, VMEventHandler* handler) {
        m_parserContext = dynamic_cast<ParserContext*>(parserContext);
        if (!m_parserContext) {
            std::cerr << "No VM parser context provided. Did you load a script?.\n";
            return VMExecStatus_t(VM_EXEC_NOT_RUNNING | VM_EXEC_ERROR);
        }

        // a ParserContext object is always tied to exactly one ScriptVM object
        assert(m_parserContext->functionProvider == this);

        ExecContext* ctx = dynamic_cast<ExecContext*>(execContex);
        if (!ctx) {
            std::cerr << "Invalid VM exec context.\n";
            return VMExecStatus_t(VM_EXEC_NOT_RUNNING | VM_EXEC_ERROR);
        }
        EventHandler* h = dynamic_cast<EventHandler*>(handler);
        if (!h) return VM_EXEC_NOT_RUNNING;
        m_eventHandler = handler;

        m_parserContext->execContext = ctx;

        ctx->status = VM_EXEC_RUNNING;
        StmtFlags_t flags = STMT_SUCCESS;

        int& frameIdx = ctx->stackFrame;
        if (frameIdx < 0) { // start condition ...
            frameIdx = -1;
            ctx->pushStack(h);
        }

        while (flags == STMT_SUCCESS && frameIdx >= 0) {
            if (frameIdx >= ctx->stack.size()) { // should never happen, otherwise it's a bug ...
                std::cerr << "CRITICAL: VM stack overflow! (" << frameIdx << ")\n";
                flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
                break;
            }

            ExecContext::StackFrame& frame = ctx->stack[frameIdx];
            switch (frame.statement->statementType()) {
                case STMT_LEAF: {
                    #if DEBUG_SCRIPTVM_CORE
                    _printIndents(frameIdx);
                    printf("-> STMT_LEAF\n");
                    #endif
                    LeafStatement* leaf = (LeafStatement*) frame.statement;
                    flags = leaf->exec();
                    ctx->popStack();
                    break;
                }

                case STMT_LIST: {
                    #if DEBUG_SCRIPTVM_CORE
                    _printIndents(frameIdx);
                    printf("-> STMT_LIST subidx=%d\n", frame.subindex);
                    #endif
                    Statements* stmts = (Statements*) frame.statement;
                    if (stmts->statement(frame.subindex)) {
                        ctx->pushStack(
                            stmts->statement(frame.subindex++)
                        );
                    } else {
                        #if DEBUG_SCRIPTVM_CORE
                        _printIndents(frameIdx);
                        printf("[END OF LIST] subidx=%d\n", frame.subindex);
                        #endif
                        ctx->popStack();
                    }
                    break;
                }

                case STMT_BRANCH: {
                    #if DEBUG_SCRIPTVM_CORE
                    _printIndents(frameIdx);
                    printf("-> STMT_BRANCH\n");
                    #endif
                    if (frame.subindex < 0) ctx->popStack();
                    else {
                        BranchStatement* branchStmt = (BranchStatement*) frame.statement;
                        frame.subindex = branchStmt->evalBranch();
                        if (frame.subindex >= 0) {
                            ctx->pushStack(
                                branchStmt->branch(frame.subindex)
                            );
                            frame.subindex = -1;
                        } else ctx->popStack();
                    }
                    break;
                }

                case STMT_LOOP: {
                    #if DEBUG_SCRIPTVM_CORE
                    _printIndents(frameIdx);
                    printf("-> STMT_LOOP\n");
                    #endif
                    While* whileStmt = (While*) frame.statement;
                    if (whileStmt->evalLoopStartCondition() && whileStmt->statements()) {
                        ctx->pushStack(
                            whileStmt->statements()
                        );
                    } else ctx->popStack();
                }
            }
        }

        if (flags & STMT_SUSPEND_SIGNALLED) {
            ctx->status = VM_EXEC_SUSPENDED;
        } else {
            ctx->status = VM_EXEC_NOT_RUNNING;
            if (flags & STMT_ERROR_OCCURRED)
                ctx->status = VM_EXEC_ERROR;
            ctx->reset();
        }

        m_eventHandler = NULL;
        m_parserContext->execContext = NULL;
        m_parserContext = NULL;
        return ctx->status;
    }

} // namespace LinuxSampler
1	/*
2	* Copyright (c) 2014 - 2016 Christian Schoenebeck
3	*
4	* http://www.linuxsampler.org
5	*
6	* This file is part of LinuxSampler and released under the same terms.
7	* See README file for details.
8	*/
9
10	#include "ScriptVM.h"
11
12	#include <string.h>
13	#include <assert.h>
14	#include "../common/global_private.h"
15	#include "tree.h"
16	#include "CoreVMFunctions.h"
17	#include "editor/NkspScanner.h"
18
19	#define DEBUG_SCRIPTVM_CORE 0
20
21	int InstrScript_parse(LinuxSampler::ParserContext*);
22
23	namespace LinuxSampler {
24
25	static void _printIndents(int n) {
26	for (int i = 0; i < n; ++i) printf(" ");
27	fflush(stdout);
28	}
29
30	static int _requiredMaxStackSizeFor(Statement* statement, int depth = 0) {
31	if (!statement) return 1;
32
33	switch (statement->statementType()) {
34	case STMT_LEAF:
35	#if DEBUG_SCRIPTVM_CORE
36	_printIndents(depth);
37	printf("-> STMT_LEAF\n");
38	#endif
39	return 1;
40
41	case STMT_LIST: {
42	#if DEBUG_SCRIPTVM_CORE
43	_printIndents(depth);
44	printf("-> STMT_LIST\n");
45	#endif
46	Statements* stmts = (Statements*) statement;
47	int max = 0;
48	for (int i = 0; stmts->statement(i); ++i) {
49	int size = _requiredMaxStackSizeFor( stmts->statement(i), depth+1 );
50	if (max < size) max = size;
51	}
52	return max + 1;
53	}
54
55	case STMT_BRANCH: {
56	#if DEBUG_SCRIPTVM_CORE
57	_printIndents(depth);
58	printf("-> STMT_BRANCH\n");
59	#endif
60	BranchStatement* branchStmt = (BranchStatement*) statement;
61	int max = 0;
62	for (int i = 0; branchStmt->branch(i); ++i) {
63	int size = _requiredMaxStackSizeFor( branchStmt->branch(i), depth+1 );
64	if (max < size) max = size;
65	}
66	return max + 1;
67	}
68
69	case STMT_LOOP: {
70	#if DEBUG_SCRIPTVM_CORE
71	_printIndents(depth);
72	printf("-> STMT_LOOP\n");
73	#endif
74	While* whileStmt = (While*) statement;
75	if (whileStmt->statements())
76	return _requiredMaxStackSizeFor( whileStmt->statements() ) + 1;
77	else
78	return 1;
79	}
80	}
81
82	return 1; // actually just to avoid compiler warning
83	}
84
85	static int _requiredMaxStackSizeFor(EventHandlers* handlers) {
86	int max = 1;
87	for (int i = 0; i < handlers->size(); ++i) {
88	int size = _requiredMaxStackSizeFor(handlers->eventHandler(i));
89	if (max < size) max = size;
90	}
91	return max;
92	}
93
94	ScriptVM::ScriptVM() : m_eventHandler(NULL), m_parserContext(NULL) {
95	m_fnMessage = new CoreVMFunction_message;
96	m_fnExit = new CoreVMFunction_exit;
97	m_fnWait = new CoreVMFunction_wait(this);
98	m_fnAbs = new CoreVMFunction_abs;
99	m_fnRandom = new CoreVMFunction_random;
100	m_fnNumElements = new CoreVMFunction_num_elements;
101	}
102
103	ScriptVM::~ScriptVM() {
104	delete m_fnMessage;
105	delete m_fnExit;
106	delete m_fnWait;
107	delete m_fnAbs;
108	delete m_fnRandom;
109	delete m_fnNumElements;
110	}
111
112	VMParserContext* ScriptVM::loadScript(const String& s) {
113	std::istringstream iss(s);
114	return loadScript(&iss);
115	}
116
117	VMParserContext* ScriptVM::loadScript(std::istream* is) {
118	ParserContext* context = new ParserContext(this);
119	//printf("parserCtx=0x%lx\n", (uint64_t)context);
120
121	context->registerBuiltInConstIntVariables( builtInConstIntVariables() );
122	context->registerBuiltInIntVariables( builtInIntVariables() );
123	context->registerBuiltInIntArrayVariables( builtInIntArrayVariables() );
124
125	context->createScanner(is);
126
127	InstrScript_parse(context);
128	dmsg(2,("Allocating %ld bytes of global int VM memory.\n", long(context->globalIntVarCount * sizeof(int))));
129	dmsg(2,("Allocating %d of global VM string variables.\n", context->globalStrVarCount));
130	if (!context->globalIntMemory)
131	context->globalIntMemory = new ArrayList<int>();
132	if (!context->globalStrMemory)
133	context->globalStrMemory = new ArrayList<String>();
134	context->globalIntMemory->resize(context->globalIntVarCount);
135	memset(&((context->globalIntMemory)[0]), 0, context->globalIntVarCount sizeof(int));
136
137	context->globalStrMemory->resize(context->globalStrVarCount);
138
139	context->destroyScanner();
140
141	return context;
142	}
143
144	void ScriptVM::dumpParsedScript(VMParserContext* context) {
145	ParserContext* ctx = dynamic_cast<ParserContext*>(context);
146	if (!ctx) {
147	std::cerr << "No VM context. So nothing to dump.\n";
148	return;
149	}
150	if (!ctx->handlers) {
151	std::cerr << "No event handlers defined in script. So nothing to dump.\n";
152	return;
153	}
154	if (!ctx->globalIntMemory) {
155	std::cerr << "Internal error: no global memory assigend to script VM.\n";
156	return;
157	}
158	ctx->handlers->dump();
159	}
160
161	VMExecContext* ScriptVM::createExecContext(VMParserContext* parserContext) {
162	ParserContext* parserCtx = dynamic_cast<ParserContext*>(parserContext);
163	ExecContext* execCtx = new ExecContext();
164
165	if (parserCtx->requiredMaxStackSize < 0) {
166	parserCtx->requiredMaxStackSize =
167	_requiredMaxStackSizeFor(&*parserCtx->handlers);
168	}
169	execCtx->stack.resize(parserCtx->requiredMaxStackSize);
170	dmsg(2,("Created VM exec context with %ld bytes VM stack size.\n",
171	long(parserCtx->requiredMaxStackSize * sizeof(ExecContext::StackFrame))));
172	//printf("execCtx=0x%lx\n", (uint64_t)execCtx);
173	const int polySize = parserCtx->polyphonicIntVarCount;
174	execCtx->polyphonicIntMemory.resize(polySize);
175	memset(&execCtx->polyphonicIntMemory[0], 0, polySize * sizeof(int));
176
177	dmsg(2,("Allocated %ld bytes polyphonic memory.\n", long(polySize * sizeof(int))));
178	return execCtx;
179	}
180
181	std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(const String& s) {
182	std::istringstream iss(s);
183	return syntaxHighlighting(&iss);
184	}
185
186	std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(std::istream* is) {
187	NkspScanner scanner(is);
188	std::vector<SourceToken> tokens = scanner.tokens();
189	std::vector<VMSourceToken> result;
190	result.resize(tokens.size());
191	for (int i = 0; i < tokens.size(); ++i) {
192	SourceToken* st = new SourceToken;
193	*st = tokens[i];
194	result[i] = VMSourceToken(st);
195	}
196	return result;
197	}
198
199	VMFunction* ScriptVM::functionByName(const String& name) {
200	if (name == "message") return m_fnMessage;
201	else if (name == "exit") return m_fnExit;
202	else if (name == "wait") return m_fnWait;
203	else if (name == "abs") return m_fnAbs;
204	else if (name == "random") return m_fnRandom;
205	else if (name == "num_elements") return m_fnNumElements;
206	return NULL;
207	}
208
209	std::map<String,VMIntRelPtr*> ScriptVM::builtInIntVariables() {
210	return std::map<String,VMIntRelPtr*>();
211	}
212
213	std::map<String,VMInt8Array*> ScriptVM::builtInIntArrayVariables() {
214	return std::map<String,VMInt8Array*>();
215	}
216
217	std::map<String,int> ScriptVM::builtInConstIntVariables() {
218	return std::map<String,int>();
219	}
220
221	VMEventHandler* ScriptVM::currentVMEventHandler() {
222	return m_eventHandler;
223	}
224
225	VMParserContext* ScriptVM::currentVMParserContext() {
226	return m_parserContext;
227	}
228
229	VMExecContext* ScriptVM::currentVMExecContext() {
230	if (!m_parserContext) return NULL;
231	return m_parserContext->execContext;
232	}
233
234	VMExecStatus_t ScriptVM::exec(VMParserContext* parserContext, VMExecContext* execContex, VMEventHandler* handler) {
235	m_parserContext = dynamic_cast<ParserContext*>(parserContext);
236	if (!m_parserContext) {
237	std::cerr << "No VM parser context provided. Did you load a script?.\n";
238	return VMExecStatus_t(VM_EXEC_NOT_RUNNING \| VM_EXEC_ERROR);
239	}
240
241	// a ParserContext object is always tied to exactly one ScriptVM object
242	assert(m_parserContext->functionProvider == this);
243
244	ExecContext* ctx = dynamic_cast<ExecContext*>(execContex);
245	if (!ctx) {
246	std::cerr << "Invalid VM exec context.\n";
247	return VMExecStatus_t(VM_EXEC_NOT_RUNNING \| VM_EXEC_ERROR);
248	}
249	EventHandler* h = dynamic_cast<EventHandler*>(handler);
250	if (!h) return VM_EXEC_NOT_RUNNING;
251	m_eventHandler = handler;
252
253	m_parserContext->execContext = ctx;
254
255	ctx->status = VM_EXEC_RUNNING;
256	StmtFlags_t flags = STMT_SUCCESS;
257
258	int& frameIdx = ctx->stackFrame;
259	if (frameIdx < 0) { // start condition ...
260	frameIdx = -1;
261	ctx->pushStack(h);
262	}
263
264	while (flags == STMT_SUCCESS && frameIdx >= 0) {
265	if (frameIdx >= ctx->stack.size()) { // should never happen, otherwise it's a bug ...
266	std::cerr << "CRITICAL: VM stack overflow! (" << frameIdx << ")\n";
267	flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
268	break;
269	}
270
271	ExecContext::StackFrame& frame = ctx->stack[frameIdx];
272	switch (frame.statement->statementType()) {
273	case STMT_LEAF: {
274	#if DEBUG_SCRIPTVM_CORE
275	_printIndents(frameIdx);
276	printf("-> STMT_LEAF\n");
277	#endif
278	LeafStatement* leaf = (LeafStatement*) frame.statement;
279	flags = leaf->exec();
280	ctx->popStack();
281	break;
282	}
283
284	case STMT_LIST: {
285	#if DEBUG_SCRIPTVM_CORE
286	_printIndents(frameIdx);
287	printf("-> STMT_LIST subidx=%d\n", frame.subindex);
288	#endif
289	Statements* stmts = (Statements*) frame.statement;
290	if (stmts->statement(frame.subindex)) {
291	ctx->pushStack(
292	stmts->statement(frame.subindex++)
293	);
294	} else {
295	#if DEBUG_SCRIPTVM_CORE
296	_printIndents(frameIdx);
297	printf("[END OF LIST] subidx=%d\n", frame.subindex);
298	#endif
299	ctx->popStack();
300	}
301	break;
302	}
303
304	case STMT_BRANCH: {
305	#if DEBUG_SCRIPTVM_CORE
306	_printIndents(frameIdx);
307	printf("-> STMT_BRANCH\n");
308	#endif
309	if (frame.subindex < 0) ctx->popStack();
310	else {
311	BranchStatement* branchStmt = (BranchStatement*) frame.statement;
312	frame.subindex = branchStmt->evalBranch();
313	if (frame.subindex >= 0) {
314	ctx->pushStack(
315	branchStmt->branch(frame.subindex)
316	);
317	frame.subindex = -1;
318	} else ctx->popStack();
319	}
320	break;
321	}
322
323	case STMT_LOOP: {
324	#if DEBUG_SCRIPTVM_CORE
325	_printIndents(frameIdx);
326	printf("-> STMT_LOOP\n");
327	#endif
328	While* whileStmt = (While*) frame.statement;
329	if (whileStmt->evalLoopStartCondition() && whileStmt->statements()) {
330	ctx->pushStack(
331	whileStmt->statements()
332	);
333	} else ctx->popStack();
334	}
335	}
336	}
337
338	if (flags & STMT_SUSPEND_SIGNALLED) {
339	ctx->status = VM_EXEC_SUSPENDED;
340	} else {
341	ctx->status = VM_EXEC_NOT_RUNNING;
342	if (flags & STMT_ERROR_OCCURRED)
343	ctx->status = VM_EXEC_ERROR;
344	ctx->reset();
345	}
346
347	m_eventHandler = NULL;
348	m_parserContext->execContext = NULL;
349	m_parserContext = NULL;
350	return ctx->status;
351	}
352
353	} // namespace LinuxSampler