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Implement async (overlapped) I/O with io_uring

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This commit is contained in:
Luke Street
2025-10-06 23:51:09 -06:00
parent f366e77956
commit df36de18bf
21 changed files with 909 additions and 143 deletions
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76
test/test_overlapped_io.c
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@@ -112,6 +112,80 @@ static void test_getoverlappedresult_pending(void) {
TEST_CHECK_EQ(0U, transferred); // No update if the operation is still pending
}
static void test_overlapped_multiple_reads(void) {
HANDLE file = CreateFileA(kFilename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
TEST_CHECK(file != INVALID_HANDLE_VALUE);
OVERLAPPED ov1 = {0};
OVERLAPPED ov2 = {0};
ov1.Offset = 0;
ov2.Offset = 16;
ov1.hEvent = CreateEventA(NULL, TRUE, FALSE, NULL);
ov2.hEvent = CreateEventA(NULL, TRUE, FALSE, NULL);
TEST_CHECK(ov1.hEvent != NULL);
TEST_CHECK(ov2.hEvent != NULL);
char head[8] = {0};
char tail[8] = {0};
BOOL issued1 = ReadFile(file, head, 5, NULL, &ov1);
if (!issued1) {
TEST_CHECK_EQ(ERROR_IO_PENDING, GetLastError());
}
BOOL issued2 = ReadFile(file, tail, 5, NULL, &ov2);
if (!issued2) {
TEST_CHECK_EQ(ERROR_IO_PENDING, GetLastError());
}
HANDLE events[2] = {ov1.hEvent, ov2.hEvent};
DWORD waitResult = WaitForMultipleObjects(2, events, TRUE, 1000);
TEST_CHECK_EQ(WAIT_OBJECT_0, waitResult);
DWORD transferred = 0;
TEST_CHECK(GetOverlappedResult(file, &ov1, &transferred, FALSE));
TEST_CHECK_EQ(5U, transferred);
head[5] = '\0';
TEST_CHECK_STR_EQ("01234", head);
transferred = 0;
TEST_CHECK(GetOverlappedResult(file, &ov2, &transferred, FALSE));
TEST_CHECK_EQ(5U, transferred);
tail[5] = '\0';
TEST_CHECK_STR_EQ("GHIJK", tail);
TEST_CHECK(CloseHandle(ov2.hEvent));
TEST_CHECK(CloseHandle(ov1.hEvent));
TEST_CHECK(CloseHandle(file));
}
static void test_getoverlappedresult_wait(void) {
HANDLE file = CreateFileA(kFilename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
TEST_CHECK(file != INVALID_HANDLE_VALUE);
OVERLAPPED ov = {0};
ov.Offset = 20;
ov.hEvent = CreateEventA(NULL, FALSE, FALSE, NULL);
TEST_CHECK(ov.hEvent != NULL);
char buffer[8] = {0};
BOOL issued = ReadFile(file, buffer, 6, NULL, &ov);
if (!issued) {
TEST_CHECK_EQ(ERROR_IO_PENDING, GetLastError());
}
DWORD transferred = 0;
TEST_CHECK(GetOverlappedResult(file, &ov, &transferred, TRUE));
TEST_CHECK_EQ(6U, transferred);
buffer[6] = '\0';
TEST_CHECK_STR_EQ("KLMNOP", buffer);
TEST_CHECK(CloseHandle(ov.hEvent));
TEST_CHECK(CloseHandle(file));
}
static void test_overlapped_write(void) {
HANDLE file = CreateFileA(kFilename, GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
@@ -157,6 +231,8 @@ int main(void) {
test_overlapped_read_with_event();
test_overlapped_eof();
test_getoverlappedresult_pending();
test_overlapped_multiple_reads();
test_getoverlappedresult_wait();
test_overlapped_write();
TEST_CHECK(DeleteFileA(kFilename));
return 0;