cef/include/capi/cef_trace_capi.h

// Copyright (c) 2024 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_TRACE_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_TRACE_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_callback_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
/// Implement this structure to receive notification when tracing has completed.
/// The functions of this structure will be called on the browser process UI
/// thread.
///
typedef struct _cef_end_tracing_callback_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Called after all processes have sent their trace data. |tracing_file| is
  /// the path at which tracing data was written. The client is responsible for
  /// deleting |tracing_file|.
  ///
  void(CEF_CALLBACK* on_end_tracing_complete)(
      struct _cef_end_tracing_callback_t* self,
      const cef_string_t* tracing_file);
} cef_end_tracing_callback_t;

///
/// Start tracing events on all processes. Tracing is initialized asynchronously
/// and |callback| will be executed on the UI thread after initialization is
/// complete.
///
/// If CefBeginTracing was called previously, or if a CefEndTracingAsync call is
/// pending, CefBeginTracing will fail and return false (0).
///
/// |categories| is a comma-delimited list of category wildcards. A category can
/// have an optional '-' prefix to make it an excluded category. Having both
/// included and excluded categories in the same list is not supported.
///
/// Examples:
/// - "test_MyTest*"
/// - "test_MyTest*,test_OtherStuff"
/// - "-excluded_category1,-excluded_category2"
///
/// This function must be called on the browser process UI thread.
///
CEF_EXPORT int cef_begin_tracing(const cef_string_t* categories,
                                 struct _cef_completion_callback_t* callback);

///
/// Stop tracing events on all processes.
///
/// This function will fail and return false (0) if a previous call to
/// CefEndTracingAsync is already pending or if CefBeginTracing was not called.
///
/// |tracing_file| is the path at which tracing data will be written and
/// |callback| is the callback that will be executed once all processes have
/// sent their trace data. If |tracing_file| is NULL a new temporary file path
/// will be used. If |callback| is NULL no trace data will be written.
///
/// This function must be called on the browser process UI thread.
///
CEF_EXPORT int cef_end_tracing(const cef_string_t* tracing_file,
                               cef_end_tracing_callback_t* callback);

///
/// Returns the current system trace time or, if none is defined, the current
/// high-res time. Can be used by clients to synchronize with the time
/// information in trace events.
///
CEF_EXPORT int64_t cef_now_from_system_trace_time(void);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_TRACE_CAPI_H_