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// @file util.cpp
/* 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 "pch.h"
#include "goodies.h"
#include "mongo/util/stacktrace.h"
#include "mongo/util/startup_test.h"
#include "file_allocator.h"
#include "time_support.h"
#include "mongoutils/str.h"
#include "timer.h"
#include "platform/atomic_word.h"
namespace mongo {
string hexdump(const char *data, unsigned len) {
verify( len < 1000000 );
const unsigned char *p = (const unsigned char *) data;
stringstream ss;
for( unsigned i = 0; i < 4 && i < len; i++ ) {
ss << std::hex << setw(2) << setfill('0');
unsigned n = p[i];
ss << n;
ss << ' ';
}
string s = ss.str();
return s;
}
boost::thread_specific_ptr<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
void setThreadName(const char *name) {
if ( ! name )
name = "NONE";
_threadName.reset( new string(name) );
#if defined( DEBUG ) && defined( _WIN32 )
// naming might be expensive so don't do "conn*" over and over
setWinThreadName(name);
#endif
}
string getThreadName() {
string * s = _threadName.get();
if ( s )
return *s;
return "";
}
bool isPrime(int n) {
int z = 2;
while ( 1 ) {
if ( z*z > n )
break;
if ( n % z == 0 )
return false;
z++;
}
return true;
}
int nextPrime(int n) {
n |= 1; // 2 goes to 3...don't care...
while ( !isPrime(n) )
n += 2;
return n;
}
struct UtilTest : public StartupTest {
void run() {
verify( isPrime(3) );
verify( isPrime(2) );
verify( isPrime(13) );
verify( isPrime(17) );
verify( !isPrime(9) );
verify( !isPrime(6) );
verify( nextPrime(4) == 5 );
verify( nextPrime(8) == 11 );
verify( endsWith("abcde", "de") );
verify( !endsWith("abcde", "dasdfasdfashkfde") );
verify( swapEndian(0x01020304) == 0x04030201 );
}
} utilTest;
ostream& operator<<( ostream &s, const ThreadSafeString &o ) {
s << o.toString();
return s;
}
bool StaticObserver::_destroyingStatics = false;
} // namespace mongo
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