SuspendProfile
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
The SuspendProfile method increments the Suspend/Resume counter for the specified profiling level.
Syntax
PROFILE_COMMAND_STATUS PROFILERAPI SuspendProfile(
PROFILE_CONTROL_LEVEL Level,
unsigned int dwId);
Parameters
Level
Indicates the profile level to which performance data collection can be applied. The following PROFILE_CONTROL_LEVEL enumerators can be used to indicate one of the three levels to which performance data collection can be applied:
| Enumerator | Description |
|---|---|
| PROFILE_GLOBALLEVEL | Global level setting affects all processes and threads in the profiling run. |
| PROFILE_PROCESSLEVEL | Process level setting affect all threads that are part of specified process. |
| PROFILE_THREADLEVEL | Thread profiling Level setting affects the specified thread. |
dwId
The process or thread identifier generated by the system.
Property value/return value
The function indicates success or failure by using PROFILE_COMMAND_STATUS enumeration. The return value can be one of the following:
| Enumerator | Description |
|---|---|
| PROFILE_ERROR_ID_NOEXIST | The profiling element ID does not exist. |
| PROFILE_ERROR_LEVEL_NOEXIST | The profiling level specified does not exist. |
| PROFILE_ERROR_MODE_NEVER | The profiling mode was set to NEVER when the function was called. |
| PROFILE_ERROR_NOT_YET_IMPLEMENTED | The profiling function call, profiling level, or combination of call and level is not yet implemented. |
| PROFILE_OK | The call was successful. |
Remarks
The initial value of the Suspend/Resume counter is 0. Each call to SuspendProfile adds 1 to the Suspend/Resume count; each call to ResumeProfile subtracts 1.
When the Suspend/Resume count is greater than 0, the Suspend/Resume state for the level is OFF. When the count is less than or equal to 0, the Suspend/Resume state is ON.
When the Start/Stop state and the Suspend/Resume state are both ON, the profiling state for the level is ON. For a thread to be profiled, the global, process, and thread level states for the thread must all be ON.
.NET Framework equivalent
Microsoft.VisualStudio.Profiler.dll
Function information
Header: Declared in VSPerf.h
Import library: VSPerf.lib
Example
The following example illustrates the SuspendProfile method. This example assumes that a prior call to StartProfile has been made for the process or thread identified by PROFILE_CURRENTID.
void ExerciseSuspendProfile()
{
// The initial value of the Suspend/Resume counter is 0.
// Each call to SuspendProfile adds 1 to the
// Suspend/Resume count; each call
// to ResumeProfile subtracts 1.
// Variables used to print output
HRESULT hResult;
TCHAR tchBuffer[256];
// Declare enumeration to hold result of call
// to SuspendProfile
PROFILE_COMMAND_STATUS profileResult;
profileResult = SuspendProfile(
PROFILE_GLOBALLEVEL,
PROFILE_CURRENTID);
// Format and print result.
LPCTSTR pszFormat = TEXT("%s %d.\0");
TCHAR* pszTxt = TEXT("SuspendProfile returned");
hResult = StringCchPrintf(tchBuffer, 256, pszFormat,
pszTxt, profileResult);
#ifdef DEBUG
OutputDebugString(tchBuffer);
#endif
}