File: emscripten_lazy_load_code.cpp

package info (click to toggle)
emscripten 2.0.12~dfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 108,440 kB
  • sloc: ansic: 510,324; cpp: 384,763; javascript: 84,341; python: 51,362; sh: 50,019; pascal: 4,159; makefile: 3,409; asm: 2,150; lisp: 1,869; ruby: 488; cs: 142
file content (50 lines) | stat: -rw-r--r-- 1,096 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
/*
 * Copyright 2019 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>
#include <stdlib.h>

extern "C" {

EM_JS(void, log_started, (), {
  out("foo_start");
})

EM_JS(void, log_ended, (), {
  out("foo_end");
})

void foo_start(int n) {
  log_started();
  // prevent inlining
  if (n > 10000) foo_start(n - 1);
  if (n > 15000) foo_start(n - 3);
}

void foo_end(int n) {
  log_ended();
  // prevent inlining
  if (n > 20000) foo_end(n - 2);
  if (n > 30000) foo_end(n - 5);
}

} // extern "C"

int main(int argc, char** argv) {
  int x = atoi(argv[1]);
  foo_start(x);
#ifdef CONDITIONAL
  if (x != 42) {
#endif
    emscripten_lazy_load_code();
#ifdef CONDITIONAL
  }
#endif
  foo_end(x); // this can be elided in the first download, only needed after we lazily load the second
  printf("all done, %d", x); // only when we reach here do we need stdio linked in
}