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0032631: Draw Harness - add DRAWEXE.evalAsync() to WebAssembly

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kgv 2021-10-19 01:56:18 +03:00 committed by smoskvin
parent 005caf39cf
commit bcb2a742a7
1 changed files with 48 additions and 0 deletions
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48
src/DRAWEXE/DRAWEXE.cxx
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@ -20,6 +20,8 @@
#include <Message_PrinterOStream.hxx>
#include <Message_PrinterSystemLog.hxx>
#include <NCollection_IndexedMap.hxx>
#include <OSD.hxx>
#include <OSD_Thread.hxx>
#include <Standard_ErrorHandler.hxx>
#ifdef OCCT_NO_PLUGINS
@ -39,6 +41,16 @@ Standard_IMPORT Standard_Boolean Draw_Interprete (const char* theCommand);
#if defined(__EMSCRIPTEN__)
#include <emscripten/bind.h>
#include <emscripten/emscripten.h>
#include <emscripten/threading.h>
//! Signal async command completion to Module.evalAsyncCompleted callback.
EM_JS(void, occJSEvalAsyncCompleted, (int theResult), {
if (Module.evalAsyncCompleted != undefined) {
Module.evalAsyncCompleted (theResult);
} else {
console.error ("Module.evalAsyncCompleted() is undefined");
}
});
//! Draw Harness interface for JavaScript.
class DRAWEXE
@ -66,6 +78,41 @@ public:
{
return Draw::GetInterpretor().Complete (theCommand.c_str());
}
//! Evaluate Tcl command asynchronously.
static void evalAsync (const std::string& theCommand)
{
#if defined(__EMSCRIPTEN_PTHREADS__)
std::string* aCmdPtr = new std::string (theCommand);
OSD_Thread aThread (&evalAsyncEntry);
aThread.Run (aCmdPtr);
#else
// fallback synchronous implementation
int aRes = eval (theCommand);
occJSEvalAsyncCompleted (aRes);
#endif
}
#if defined(__EMSCRIPTEN_PTHREADS__)
private:
//! Thread entry for async command execution.
static Standard_Address evalAsyncEntry (Standard_Address theData)
{
OSD::SetSignal (false);
std::string* aCmdPtr = (std::string* )theData;
const std::string aCmd = *aCmdPtr;
delete aCmdPtr;
int aRes = eval (aCmd);
emscripten_async_run_in_main_runtime_thread (EM_FUNC_SIG_VI, evalAsyncCompletedEntry, aRes);
return 0;
}
//! Notify Module.evalAsyncCompleted about async cmd completion.
static void evalAsyncCompletedEntry (int theResult)
{
occJSEvalAsyncCompleted (theResult);
}
#endif
};
//! Print message to Module.printMessage callback.
@ -109,6 +156,7 @@ protected:
EMSCRIPTEN_BINDINGS(DRAWEXE) {
emscripten::function("eval", &DRAWEXE::eval);
emscripten::function("evalAsync", &DRAWEXE::evalAsync);
emscripten::function("isComplete", &DRAWEXE::isComplete);
}
#endif