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igt/kms_flip/nonblocking_read: Demonstrate that O_NONBLOCK is a myth

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-10-08 10:44:06 +01:00
parent 7041edfd14
commit c7551bf7cc
1 changed files with 25 additions and 0 deletions
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25
tests/kms_flip.c
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@ -1513,6 +1513,28 @@ static void kms_flip_exit_handler(int sig)
}
}
static void test_nonblocking_read(int in)
{
char buffer[1024];
int fd = dup(in);
int ret;
ret = -1;
if (fd != -1)
ret = fcntl(fd, F_GETFL);
if (ret != -1) {
ret |= O_NONBLOCK;
ret = fcntl(fd, F_SETFL, ret);
}
igt_require(ret != -1);
ret = read(fd, buffer, sizeof(buffer));
igt_assert_eq(ret, -1);
igt_assert_eq(errno, EAGAIN);
close(fd);
}
int main(int argc, char **argv)
{
struct {
@ -1603,6 +1625,9 @@ int main(int argc, char **argv)
batch = intel_batchbuffer_alloc(bufmgr, devid);
}
igt_subtest("nonblocking-read")
test_nonblocking_read(drm_fd);
for (i = 0; i < sizeof(tests) / sizeof (tests[0]); i++) {
igt_subtest(tests[i].name)
run_test(tests[i].duration, tests[i].flags);