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
|
#include <assert.h>
#include <emscripten/threading.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#define OLD 42
int main() {
uint8_t buffer[16];
memset(&buffer[0], OLD, sizeof(buffer));
uint8_t o8 = emscripten_atomic_exchange_u8(&buffer[0], 0x12);
assert(o8 == OLD);
assert(buffer[0] == 0x12);
assert(buffer[1] == OLD);
uint16_t o16 = emscripten_atomic_exchange_u16(&buffer[0], 0x3456);
assert((o16 & 0xff) == 0x12);
assert((o16 >> 8) == OLD);
assert(buffer[0] == 0x56);
assert(buffer[1] == 0x34);
assert(buffer[2] == OLD);
uint32_t o32 = emscripten_atomic_exchange_u32(&buffer[0], 0xabcdef91);
assert((o32 & 0xff) == 0x56);
assert(((o32 >> 8) & 0xff) == 0x34);
assert(((o32 >> 16) & 0xff) == OLD);
assert(((o32 >> 24) & 0xff) == OLD);
assert(buffer[0] == 0x91);
assert(buffer[1] == 0xef);
assert(buffer[2] == 0xcd);
assert(buffer[3] == 0xab);
assert(buffer[4] == OLD);
printf("OK\n");
}
|
