Rework CPU counting

Currently htop does not support offline CPUs and hot-swapping, e.g. via
    echo 0 > /sys/devices/system/cpu/cpu2/online

Split the current single cpuCount variable into activeCPUs and
existingCPUs.

Supersedes: #650
Related: #580

1 files changed, 16 insertions, 2 deletions

diff --git a/openbsd/Platform.c b/openbsd/Platform.c
index 1afbdfde..2116cccb 100644
--- a/openbsd/Platform.c
+++ b/openbsd/Platform.c
@@ -169,11 +169,25 @@ int Platform_getMaxPid() {
 
 double Platform_setCPUValues(Meter* this, unsigned int cpu) {
    const OpenBSDProcessList* pl = (const OpenBSDProcessList*) this->pl;
-   const CPUData* cpuData = &(pl->cpus[cpu]);
-   double total = cpuData->totalPeriod == 0 ? 1 : cpuData->totalPeriod;
+   const CPUData* cpuData = NULL;
+   double total;
    double totalPercent;
    double* v = this->values;
 
+   for (unsigned int i = 0; i < pl->super.activeCPUs; i++) {
+      if (pl->cpus[i].cpuIndex == cpu) {
+         cpuData = &(pl->cpus[i]);
+         break;
+      }
+   }
+
+   if (!cpuData) {
+      this->curItems = 0;
+      return NAN;
+   }
+
+   total = cpuData->totalPeriod == 0 ? 1 : cpuData->totalPeriod;
+
    v[CPU_METER_NICE] = cpuData->nicePeriod / total * 100.0;
    v[CPU_METER_NORMAL] = cpuData->userPeriod / total * 100.0;
    if (this->pl->settings->detailedCPUTime) {