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/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "mongo/platform/basic.h"
#include "mongo/platform/compiler.h"
#include "mongo/util/concurrency/thread_name.h"
#include <boost/thread/tss.hpp>
namespace mongo {
namespace {
boost::thread_specific_ptr<std::string> _threadName;
#if defined(_WIN32)
#define MS_VC_EXCEPTION 0x406D1388
#pragma pack(push,8)
typedef struct tagTHREADNAME_INFO {
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#pragma pack(pop)
void setWinThreadName(const char *name) {
/* is the sleep here necessary???
Sleep(10);
*/
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = -1;
info.dwFlags = 0;
__try {
RaiseException( MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info );
}
__except(EXCEPTION_EXECUTE_HANDLER) {
}
}
#endif
} // namespace
void setThreadName(StringData name) {
_threadName.reset(new string(name.rawData(), name.size()));
#if defined( DEBUG ) && defined( _WIN32 )
// naming might be expensive so don't do "conn*" over and over
setWinThreadName(_threadName.get()->c_str());
#endif
}
const std::string& getThreadName() {
std::string* s;
while (!(s = _threadName.get())) {
setThreadName("");
}
return *s;
}
} // namespace mongo
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