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lib: add igt_wait()

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Just a little helper for code that needs to wait for a certain
condition to happen. It has the nice advantage that it can survive the
signal helper.

Despite the callers added in this patch, there is another that will go
in a separate patch, and another in a new IGT test file that I plan to
push later.

v2: Check COND again before returning in case we hit the timeout.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
This commit is contained in:
Paulo Zanoni
2014-12-03 16:12:49 -02:00
parent a734ac2058
commit 9bb04d3aa6
3 changed files with 49 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/pm_rpm.c
+5 -23
View File
@@ -153,24 +153,16 @@ static uint64_t get_residency(uint32_t type)
static bool pc8_plus_residency_changed(unsigned int timeout_sec)
{
unsigned int i;
uint64_t res_pc8, res_pc9, res_pc10;
int to_sleep = 100 * 1000;
res_pc8 = get_residency(MSR_PC8_RES);
res_pc9 = get_residency(MSR_PC9_RES);
res_pc10 = get_residency(MSR_PC10_RES);
for (i = 0; i < timeout_sec * 1000 * 1000; i += to_sleep) {
if (res_pc8 != get_residency(MSR_PC8_RES) ||
res_pc9 != get_residency(MSR_PC9_RES) ||
res_pc10 != get_residency(MSR_PC10_RES)) {
return true;
}
usleep(to_sleep);
}
return false;
return igt_wait(res_pc8 != get_residency(MSR_PC8_RES) ||
res_pc9 != get_residency(MSR_PC9_RES) ||
res_pc10 != get_residency(MSR_PC10_RES),
timeout_sec * 1000, 100);
}
static enum pc8_status get_pc8_status(void)
@@ -191,17 +183,7 @@ static enum pc8_status get_pc8_status(void)
static bool wait_for_pc8_status(enum pc8_status status)
{
int i;
int hundred_ms = 100 * 1000, ten_s = 10 * 1000 * 1000;
for (i = 0; i < ten_s; i += hundred_ms) {
if (get_pc8_status() == status)
return true;
usleep(hundred_ms);
}
return false;
return igt_wait(get_pc8_status() == status, 10000, 100);
}
static bool wait_for_suspended(void)