// Copyright 2015 The Emscripten Authors. All rights reserved.

// Emscripten is available under two separate licenses, the MIT license and the

// University of Illinois/NCSA Open Source License. Both these licenses can be

// found in the LICENSE file.

#include <emscripten.h>

#include <stdio.h>

class DOS_Device {

int devnum;

public:

DOS_Device() { devnum = 0; }

virtual bool Read(unsigned char * data,unsigned short * size);

};

DOS_Device *Devices[10];

bool __attribute__((noinline)) DOS_Device::Read(unsigned char * data,unsigned short * size) {

printf("DOS_Device::Read (this = %ld)\n", (long)this);

return Devices[devnum]->Read(data,size);

}

class device_CON : public DOS_Device {

public:

bool Read(unsigned char * data,unsigned short * size);

};

bool device_CON::Read(unsigned char * data,unsigned short * size) {

printf("device_CON::Read (this = %ld) Sleep--> \n", (long)this);

EM_ASM({

Module.the_this = $0;

out('first this ' + Module.the_this);

}, this);

emscripten_sleep(1000);

EM_ASM({

out('second this ' + $0);

assert(Module.the_this === $0, 'this must be unchanged');

}, this);

printf("<--Sleep (this = %ld)\n", (long)this);

return true;

}

int main(void) {

device_CON con;

Devices[0] = &con;

DOS_Device dev;

dev.Read(0,0);

return 0;

}