SkEventTracingCategories Class Reference

#include <EventTracingPriv.h>

Public Member Functions
	SkEventTracingCategories ()
uint8_t *	getCategoryGroupEnabled (const char *name)
const char *	getCategoryGroupName (const uint8_t *categoryEnabledFlag)

Detailed Description

Helper class used by internal implementations of SkEventTracer to manage categories.

Definition at line 22 of file EventTracingPriv.h.

Constructor & Destructor Documentation

SkEventTracingCategories()

SkEventTracingCategories::SkEventTracingCategories ( )

inline

Definition at line 24 of file EventTracingPriv.h.

: fNumCategories(0) {}

Member Function Documentation

getCategoryGroupEnabled()

uint8_t * SkEventTracingCategories::getCategoryGroupEnabled

(

const char *

name

)

Definition at line 76 of file EventTracingPriv.cpp.

                                                                           {
    static_assert(0 == offsetof(CategoryState, fEnabled), "CategoryState");
 
    // We ignore the "disabled-by-default-" prefix in our internal tools
    if (SkStrStartsWith(name, TRACE_CATEGORY_PREFIX)) {
        name += strlen(TRACE_CATEGORY_PREFIX);
    }
 
    // Chrome's implementation of this API does a two-phase lookup (once without a lock, then again
    // with a lock. But the tracing macros avoid calling these functions more than once per site,
    // so just do something simple (and easier to reason about):
    SkAutoMutexExclusive lock(fMutex);
    for (int i = 0; i < fNumCategories; ++i) {
        if (0 == strcmp(name, fCategories[i].fName)) {
            return reinterpret_cast<uint8_t*>(&fCategories[i]);
        }
    }
 
    if (fNumCategories >= kMaxCategories) {
        SkDEBUGFAIL("Exhausted event tracing categories. Increase kMaxCategories.");
        return reinterpret_cast<uint8_t*>(&fCategories[0]);
    }
 
    fCategories[fNumCategories].fEnabled =
            CommandLineFlags::ShouldSkip(FLAGS_traceMatch, name)
                    ? 0
                    : SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags;
 
    fCategories[fNumCategories].fName = name;
    return reinterpret_cast<uint8_t*>(&fCategories[fNumCategories++]);
}

getCategoryGroupName()

const char * SkEventTracingCategories::getCategoryGroupName

(

const uint8_t *

categoryEnabledFlag

)

Definition at line 108 of file EventTracingPriv.cpp.

                                                                                             {
    if (categoryEnabledFlag) {
        return reinterpret_cast<const CategoryState*>(categoryEnabledFlag)->fName;
    }
    return nullptr;
}

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The documentation for this class was generated from the following files:

• third_party/skia/tools/trace/EventTracingPriv.h
• third_party/skia/tools/trace/EventTracingPriv.cpp