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Sanitize virDiscoverHostPMFeature to return a boolean

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Since virDiscoverHostPMFeature is just checking one feature,
there is no reason for it to return a bitmask. Change it to
return a boolean

* src/util/util.c, src/util/util.h: Make virDiscoverHostPMFeature
  return a boolean
This commit is contained in:
Daniel P. Berrange 2011-11-29 14:29:28 +00:00
parent 6ea25cd975
commit 33386276a9
2 changed files with 16 additions and 10 deletions
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24
src/util/util.c
View File

@ -2624,13 +2624,12 @@ virTypedParameterArrayClear(virTypedParameterPtr params, int nparams)
/**
* virDiscoverHostPMFeature:
* @bitmask: The bitmask which should be populated with the result of
* the query
* @feature: The power management feature to check whether it is supported
* by the host. Values could be:
* VIR_NODE_SUSPEND_TARGET_MEM
* VIR_NODE_SUSPEND_TARGET_DISK
* VIR_NODE_SUSPEND_TARGET_HYBRID
* @supported: set to true if supported, false otherwise
*
* Run the script 'pm-is-supported' (from the pm-utils package)
* to find out if @feature is supported by the host.
@ -2638,12 +2637,14 @@ virTypedParameterArrayClear(virTypedParameterPtr params, int nparams)
* Returns 0 if the query was successful, -1 on failure.
*/
int
virDiscoverHostPMFeature(unsigned int *bitmask, unsigned int feature)
virDiscoverHostPMFeature(unsigned int feature, bool *supported)
{
virCommandPtr cmd;
int status;
int ret = -1;
*supported = false;
switch (feature) {
case VIR_NODE_SUSPEND_TARGET_MEM:
cmd = virCommandNewArgList("pm-is-supported", "--suspend", NULL);
@ -2665,9 +2666,7 @@ virDiscoverHostPMFeature(unsigned int *bitmask, unsigned int feature)
* Check return code of command == 0 for success
* (i.e., the PM capability is supported)
*/
if (status == 0)
*bitmask |= 1U << feature;
*supported = (status == 0);
ret = 0;
cleanup:
@ -2691,23 +2690,30 @@ int
virGetPMCapabilities(unsigned int *bitmask)
{
int ret;
bool supported;
*bitmask = 0;
/* Check support for Suspend-to-RAM (S3) */
ret = virDiscoverHostPMFeature(bitmask, VIR_NODE_SUSPEND_TARGET_MEM);
ret = virDiscoverHostPMFeature(VIR_NODE_SUSPEND_TARGET_MEM, &supported);
if (ret < 0)
return -1;
if (supported)
*bitmask |= (1 << VIR_NODE_SUSPEND_TARGET_MEM);
/* Check support for Suspend-to-Disk (S4) */
ret = virDiscoverHostPMFeature(bitmask, VIR_NODE_SUSPEND_TARGET_DISK);
ret = virDiscoverHostPMFeature(VIR_NODE_SUSPEND_TARGET_DISK, &supported);
if (ret < 0)
return -1;
if (supported)
*bitmask |= (1 << VIR_NODE_SUSPEND_TARGET_DISK);
/* Check support for Hybrid-Suspend */
ret = virDiscoverHostPMFeature(bitmask, VIR_NODE_SUSPEND_TARGET_HYBRID);
ret = virDiscoverHostPMFeature(VIR_NODE_SUSPEND_TARGET_HYBRID, &supported);
if (ret < 0)
return -1;
if (supported)
*bitmask |= (1 << VIR_NODE_SUSPEND_TARGET_HYBRID);
return 0;
}

2
src/util/util.h
View File

@ -263,7 +263,7 @@ void virTypedParameterArrayClear(virTypedParameterPtr params, int nparams);
/* Power Management Capabilities of the host system */
int virDiscoverHostPMFeature(unsigned int *bitmask, unsigned int feature);
int virDiscoverHostPMFeature(unsigned int feature, bool *supported);
int virGetPMCapabilities(unsigned int *bitmask);
#endif /* __VIR_UTIL_H__ */