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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 "unittest.h"
#include "file_allocator.h"
#include "optime.h"
#include "time_support.h"
namespace mongo {
string hexdump(const char *data, unsigned len) {
assert( 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;
unsigned _setThreadName( const char * name ) {
if ( ! name ) name = "NONE";
static unsigned N = 0;
if ( strcmp( name , "conn" ) == 0 ) {
unsigned n = ++N;
stringstream ss;
ss << name << n;
_threadName.reset( new string( ss.str() ) );
return n;
}
_threadName.reset( new string(name) );
return 0;
}
#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) {
}
}
unsigned setThreadName(const char *name) {
unsigned n = _setThreadName( name );
#if !defined(_DEBUG)
// naming might be expensive so don't do "conn*" over and over
if( string("conn") == name )
return n;
#endif
setWinThreadName(name);
return n;
}
#else
unsigned setThreadName(const char * name ) {
return _setThreadName( name );
}
#endif
string getThreadName() {
string * s = _threadName.get();
if ( s )
return *s;
return "";
}
vector<UnitTest*> *UnitTest::tests = 0;
bool UnitTest::running = false;
const char *default_getcurns() { return ""; }
const char * (*getcurns)() = default_getcurns;
int logLevel = 0;
int tlogLevel = 0;
mongo::mutex Logstream::mutex("Logstream");
int Logstream::doneSetup = Logstream::magicNumber();
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 UnitTest {
void run() {
assert( WrappingInt(0) <= WrappingInt(0) );
assert( WrappingInt(0) <= WrappingInt(1) );
assert( !(WrappingInt(1) <= WrappingInt(0)) );
assert( (WrappingInt(0xf0000000) <= WrappingInt(0)) );
assert( (WrappingInt(0xf0000000) <= WrappingInt(9000)) );
assert( !(WrappingInt(300) <= WrappingInt(0xe0000000)) );
assert( tdiff(3, 4) == 1 );
assert( tdiff(4, 3) == -1 );
assert( tdiff(0xffffffff, 0) == 1 );
assert( isPrime(3) );
assert( isPrime(2) );
assert( isPrime(13) );
assert( isPrime(17) );
assert( !isPrime(9) );
assert( !isPrime(6) );
assert( nextPrime(4) == 5 );
assert( nextPrime(8) == 11 );
assert( endsWith("abcde", "de") );
assert( !endsWith("abcde", "dasdfasdfashkfde") );
assert( swapEndian(0x01020304) == 0x04030201 );
}
} utilTest;
OpTime OpTime::last(0, 0);
/* this is a good place to set a breakpoint when debugging, as lots of warning things
(assert, wassert) call it.
*/
void sayDbContext(const char *errmsg) {
if ( errmsg ) {
problem() << errmsg << endl;
}
printStackTrace();
}
/* note: can't use malloc herein - may be in signal handler.
logLockless() likely does not comply and should still be fixed todo
*/
void rawOut( const string &s ) {
if( s.empty() ) return;
char buf[64];
time_t_to_String( time(0) , buf );
/* truncate / don't show the year: */
buf[19] = ' ';
buf[20] = 0;
Logstream::logLockless(buf);
Logstream::logLockless(s);
Logstream::logLockless("\n");
}
ostream& operator<<( ostream &s, const ThreadSafeString &o ) {
s << o.toString();
return s;
}
bool StaticObserver::_destroyingStatics = false;
} // namespace mongo
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