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PCP: ensure unsigned types used throughout CPU count detection

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This cannot be negative in these code locations, but for the
purposes of static checking like Coverity scan make it clear
and used the same unsigned type as ProcessList.h for the CPU
count variable (matching PL activeCPUs and existingCPUs).
This commit is contained in:
Nathan Scott 2021-08-17 14:41:55 +10:00
parent c401ac3a98
commit c7f634ec21
3 changed files with 7 additions and 7 deletions
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2
pcp/PCPProcessList.c
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@ -35,7 +35,7 @@ static void PCPProcessList_updateCPUcount(PCPProcessList* this) {
unsigned int cpus = Platform_getMaxCPU();
if (cpus == pl->existingCPUs)
return;
if (cpus <= 0)
if (cpus == 0)
cpus = pl->activeCPUs;
if (cpus <= 1)
cpus = pl->activeCPUs = 1;

8
pcp/Platform.c
View File

@ -396,15 +396,15 @@ void Platform_getLoadAverage(double* one, double* five, double* fifteen) {
}
}
int Platform_getMaxCPU(void) {
unsigned int Platform_getMaxCPU(void) {
if (pcp->ncpu)
return pcp->ncpu;
pmAtomValue value;
if (PCPMetric_values(PCP_HINV_NCPU, &value, 1, PM_TYPE_32) != NULL)
pcp->ncpu = value.l;
if (PCPMetric_values(PCP_HINV_NCPU, &value, 1, PM_TYPE_U32) != NULL)
pcp->ncpu = value.ul;
else
pcp->ncpu = -1;
pcp->ncpu = 1;
return pcp->ncpu;
}

4
pcp/Platform.h
View File

@ -54,7 +54,7 @@ typedef struct Platform_ {
long long btime; /* boottime in seconds since the epoch */
char* release; /* uname and distro from this context */
int pidmax; /* maximum platform process identifier */
int ncpu; /* maximum processor count configured */
unsigned int ncpu; /* maximum processor count configured */
} Platform;
extern ProcessField Platform_defaultFields[];
@ -79,7 +79,7 @@ void Platform_getLoadAverage(double* one, double* five, double* fifteen);
long long Platform_getBootTime(void);
int Platform_getMaxCPU(void);
unsigned int Platform_getMaxCPU(void);
int Platform_getMaxPid(void);