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Bug 704176 - introduce GetHistogramEnumId; r=taras

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--HG--
extra : rebase_source : 128230c4204b38de41963d5d89ed8fac446093a8
This commit is contained in:
Nathan Froyd 2012-01-09 15:42:34 -05:00
parent a8a418330d
commit 73a7e7fa52
1 changed files with 30 additions and 9 deletions
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39
toolkit/components/telemetry/Telemetry.cpp
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@ -75,6 +75,7 @@ public:
static void RecordSlowStatement(const nsACString &statement,
const nsACString &dbName,
PRUint32 delay);
static nsresult GetHistogramEnumId(const char *name, Telemetry::ID &id);
struct StmtStats {
PRUint32 hitCount;
PRUint32 totalTime;
@ -412,28 +413,48 @@ TelemetryImpl::AddSQLInfo(JSContext *cx, JSObject *rootObj, bool mainThread)
return true;
}
nsresult
TelemetryImpl::GetHistogramByName(const nsACString &name, Histogram **ret)
TelemetryImpl::GetHistogramEnumId(const char *name, Telemetry::ID *id)
{
if (!sTelemetry) {
return NS_ERROR_FAILURE;
}
// Cache names
// Note the histogram names are statically allocated
if (!mHistogramMap.Count()) {
TelemetryImpl::HistogramMapType *map = &sTelemetry->mHistogramMap;
if (!map->Count()) {
for (PRUint32 i = 0; i < Telemetry::HistogramCount; i++) {
CharPtrEntryType *entry = mHistogramMap.PutEntry(gHistograms[i].id);
CharPtrEntryType *entry = map->PutEntry(gHistograms[i].id);
if (NS_UNLIKELY(!entry)) {
mHistogramMap.Clear();
map->Clear();
return NS_ERROR_OUT_OF_MEMORY;
}
entry->mData = (Telemetry::ID) i;
}
}
CharPtrEntryType *entry = mHistogramMap.GetEntry(PromiseFlatCString(name).get());
if (!entry)
return NS_ERROR_FAILURE;
CharPtrEntryType *entry = map->GetEntry(name);
// A histogram might not be in our static list of names (e.g. secret
// histograms maintained by Histogram itself or addon histograms).
// Use a separate error code to help the caller.
if (!entry) {
return NS_ERROR_INVALID_ARG;
}
*id = entry->mData;
return NS_OK;
}
nsresult rv = GetHistogramByEnumId(entry->mData, ret);
nsresult
TelemetryImpl::GetHistogramByName(const nsACString &name, Histogram **ret)
{
Telemetry::ID id;
nsresult rv = GetHistogramEnumId(PromiseFlatCString(name).get(), &id);
if (NS_FAILED(rv)) {
return rv;
}
rv = GetHistogramByEnumId(id, ret);
if (NS_FAILED(rv))
return rv;