amxmodx/dlls/mysqlx/threading.cpp
2006-05-19 01:54:28 +00:00

666 lines
12 KiB
C++

#include "amxxmodule.h"
#include "mysql2_header.h"
#include "threading.h"
using namespace SourceMod;
using namespace SourceHook;
MainThreader g_Threader;
ThreadWorker *g_pWorker = NULL;
extern DLL_FUNCTIONS *g_pFunctionTable;
StringPool g_StringPool;
IMutex *g_QueueLock = NULL;
CStack<MysqlThread *> g_ThreadQueue;
CStack<MysqlThread *> g_FreeThreads;
float g_lasttime = 0.0f;
void ShutdownThreading()
{
if (g_pWorker)
{
g_pWorker->Stop(true);
delete g_pWorker;
g_pWorker = NULL;
}
g_QueueLock->Lock();
while (!g_ThreadQueue.empty())
{
delete g_ThreadQueue.front();
g_ThreadQueue.pop();
}
while (!g_FreeThreads.empty())
{
delete g_FreeThreads.front();
g_FreeThreads.pop();
}
g_QueueLock->Unlock();
g_QueueLock->DestroyThis();
FreeHandleTable();
}
//public QueryHandler(state, Handle:query, error[], errnum, data[], size)
//native SQL_ThreadQuery(Handle:cn_tuple, const handler[], const query[], const data[]="", dataSize=0);
static cell AMX_NATIVE_CALL SQL_ThreadQuery(AMX *amx, cell *params)
{
if (!g_pWorker)
{
MF_LogError(amx, AMX_ERR_NATIVE, "Thread worker was unable to start.");
return 0;
}
SQL_Connection *cn = (SQL_Connection *)GetHandle(params[1], Handle_Connection);
if (!cn)
{
MF_LogError(amx, AMX_ERR_NATIVE, "Invalid handle: %d", params[1]);
return 0;
}
int len;
const char *handler = MF_GetAmxString(amx, params[2], 0, &len);
int fwd = MF_RegisterSPForwardByName(amx, handler, FP_CELL, FP_CELL, FP_STRING, FP_CELL, FP_ARRAY, FP_CELL, FP_DONE);
if (fwd < 1)
{
MF_LogError(amx, AMX_ERR_NATIVE, "Function not found: %s", handler);
return 0;
}
MysqlThread *kmThread;
g_QueueLock->Lock();
if (g_FreeThreads.empty())
{
kmThread = new MysqlThread();
} else {
kmThread = g_FreeThreads.front();
g_FreeThreads.pop();
}
g_QueueLock->Unlock();
kmThread->SetInfo(cn->host, cn->user, cn->pass, cn->db, cn->port);
kmThread->SetForward(fwd);
kmThread->SetQuery(MF_GetAmxString(amx, params[3], 1, &len));
kmThread->SetCellData(MF_GetAmxAddr(amx, params[4]), (ucell)params[5]);
g_pWorker->MakeThread(kmThread);
return 1;
}
MysqlThread::MysqlThread()
{
m_fwd = 0;
m_data = NULL;
m_datalen = 0;
m_maxdatalen = 0;
}
MysqlThread::~MysqlThread()
{
if (m_fwd)
{
MF_UnregisterSPForward(m_fwd);
m_fwd = 0;
}
delete [] m_data;
m_data = NULL;
}
void MysqlThread::SetCellData(cell data[], ucell len)
{
if (len > m_maxdatalen)
{
delete [] m_data;
m_data = new cell[len];
m_maxdatalen = len;
}
if (len)
{
m_datalen = len;
memcpy(m_data, data, len*sizeof(cell));
}
}
void MysqlThread::SetForward(int forward)
{
m_fwd = forward;
}
void MysqlThread::SetInfo(const char *host, const char *user, const char *pass, const char *db, int port)
{
m_host.assign(host);
m_user.assign(user);
m_pass.assign(pass);
m_db.assign(db);
m_port = port;
}
void MysqlThread::SetQuery(const char *query)
{
m_query.assign(query);
}
void MysqlThread::RunThread(IThreadHandle *pHandle)
{
DatabaseInfo info;
info.database = m_db.c_str();
info.pass = m_pass.c_str();
info.user = m_user.c_str();
info.host = m_host.c_str();
info.port = m_port;
memset(&m_qrInfo, 0, sizeof(m_qrInfo));
IDatabase *pDatabase = g_Mysql.Connect(&info, &m_qrInfo.amxinfo.info.errorcode, m_qrInfo.amxinfo.error, 254);
IQuery *pQuery = NULL;
if (!pDatabase)
{
m_qrInfo.connect_success = false;
m_qrInfo.query_success = false;
} else {
m_qrInfo.connect_success = true;
pQuery = pDatabase->PrepareQuery(m_query.c_str());
if (!pQuery->Execute(&m_qrInfo.amxinfo.info, m_qrInfo.amxinfo.error, 254))
{
m_qrInfo.query_success = false;
} else {
m_qrInfo.query_success = true;
}
}
if (m_qrInfo.query_success && m_qrInfo.amxinfo.info.rs)
{
m_atomicResult.CopyFrom(m_qrInfo.amxinfo.info.rs);
m_qrInfo.amxinfo.pQuery = NULL;
m_qrInfo.amxinfo.info.rs = &m_atomicResult;
}
if (pQuery)
{
pQuery->FreeHandle();
pQuery = NULL;
}
if (pDatabase)
{
pDatabase->FreeHandle();
pDatabase = NULL;
}
}
void MysqlThread::Invalidate()
{
m_atomicResult.FreeHandle();
}
void MysqlThread::OnTerminate(IThreadHandle *pHandle, bool cancel)
{
if (cancel)
{
Invalidate();
g_QueueLock->Lock();
g_FreeThreads.push(this);
g_QueueLock->Unlock();
} else {
g_QueueLock->Lock();
g_ThreadQueue.push(this);
g_QueueLock->Unlock();
}
}
void NullFunc(void *ptr, unsigned int num)
{
}
//public QueryHandler(state, Handle:query, error[], errnum, data[], size)
void MysqlThread::Execute()
{
cell data_addr;
if (m_datalen)
{
data_addr = MF_PrepareCellArray(m_data, m_datalen);
} else {
static cell tmpdata[1] = {0};
data_addr = MF_PrepareCellArray(tmpdata, 1);
}
int state = 0;
if (!m_qrInfo.connect_success)
{
state = -2;
} else if (!m_qrInfo.query_success) {
state = -1;
}
if (state != 0)
{
MF_ExecuteForward(m_fwd,
(cell)state,
(cell)0,
m_qrInfo.amxinfo.error,
m_qrInfo.amxinfo.info.errorcode,
data_addr,
m_datalen);
} else {
unsigned int hndl = MakeHandle(&m_qrInfo.amxinfo, Handle_Query, NullFunc);
MF_ExecuteForward(m_fwd,
(cell)0,
(cell)hndl,
"",
(cell)0,
data_addr,
m_datalen);
FreeHandle(hndl);
}
}
/*****************
* METAMOD STUFF *
*****************/
void OnPluginsLoaded()
{
if (g_pWorker)
{
return;
}
if (!g_StringPool.IsThreadable())
{
g_StringPool.SetMutex(g_Threader.MakeMutex());
g_QueueLock = g_Threader.MakeMutex();
}
g_pWorker = new ThreadWorker(&g_Threader, 250);
if (!g_pWorker->Start())
{
delete g_pWorker;
g_pWorker = NULL;
}
g_pFunctionTable->pfnSpawn = NULL;
g_lasttime = 0.0f;
return;
}
void StartFrame()
{
if (g_pWorker && (g_lasttime < gpGlobals->time))
{
g_lasttime = gpGlobals->time + 0.3f;
g_QueueLock->Lock();
size_t remaining = g_ThreadQueue.size();
if (remaining)
{
MysqlThread *kmThread;
do
{
kmThread = g_ThreadQueue.front();
g_ThreadQueue.pop();
g_QueueLock->Unlock();
kmThread->Execute();
kmThread->Invalidate();
g_FreeThreads.push(kmThread);
g_QueueLock->Lock();
} while (!g_ThreadQueue.empty());
}
g_QueueLock->Unlock();
}
RETURN_META(MRES_IGNORED);
}
void OnPluginsUnloading()
{
if (!g_pWorker)
return;
g_pWorker->Stop(false);
delete g_pWorker;
g_pWorker = NULL;
}
/***********************
* ATOMIC RESULT STUFF *
***********************/
AtomicResult::AtomicResult()
{
m_IsFree = true;
m_CurRow = 0;
m_AllocFields = 0;
m_AllocRows = 0;
m_Rows = NULL;
m_Fields = NULL;
}
AtomicResult::~AtomicResult()
{
if (!m_IsFree)
{
FreeHandle();
}
if (m_AllocFields)
{
delete [] m_Fields;
m_AllocFields = 0;
m_Fields = NULL;
}
if (m_AllocRows)
{
for (unsigned int i=0; i<m_AllocRows; i++)
delete [] m_Rows[i];
delete [] m_Rows;
m_AllocRows = 0;
m_Rows = NULL;
}
}
unsigned int AtomicResult::RowCount()
{
return m_RowCount;
}
bool AtomicResult::IsNull(unsigned int columnId)
{
return (GetString(columnId) == NULL);
}
unsigned int AtomicResult::FieldCount()
{
return m_FieldCount;
}
bool AtomicResult::FieldNameToNum(const char *name, unsigned int *columnId)
{
for (unsigned int i=0; i<m_FieldCount; i++)
{
if (strcmp(g_StringPool.GetString(m_Fields[i]), name) == 0)
{
if (*columnId)
*columnId = i;
return true;
}
}
return false;
}
const char *AtomicResult::FieldNumToName(unsigned int num)
{
if (num >= m_FieldCount)
return NULL;
return g_StringPool.GetString(m_Fields[num]);
}
double AtomicResult::GetDouble(unsigned int columnId)
{
return atof(GetStringSafe(columnId));
}
float AtomicResult::GetFloat(unsigned int columnId)
{
return atof(GetStringSafe(columnId));
}
int AtomicResult::GetInt(unsigned int columnId)
{
return atoi(GetStringSafe(columnId));
}
const char *AtomicResult::GetRaw(unsigned int columnId, size_t *length)
{
//we don't support this yet...
*length = 0;
return "";
}
const char *AtomicResult::GetStringSafe(unsigned int columnId)
{
const char *str = GetString(columnId);
return str ? str : "";
}
const char *AtomicResult::GetString(unsigned int columnId)
{
if (columnId >= m_FieldCount)
return NULL;
return g_StringPool.GetString(m_Rows[m_CurRow][columnId]);
}
IResultRow *AtomicResult::GetRow()
{
return static_cast<IResultRow *>(this);
}
bool AtomicResult::IsDone()
{
if (m_CurRow >= m_RowCount)
return true;
return false;
}
void AtomicResult::NextRow()
{
m_CurRow++;
}
void AtomicResult::_InternalClear()
{
if (m_IsFree)
return;
m_IsFree = true;
g_StringPool.StartHardLock();
for (unsigned int i=0; i<m_FieldCount; i++)
g_StringPool.FreeString(m_Fields[i]);
for (unsigned int i=0; i<m_RowCount; i++)
{
for (unsigned int j=0; j<m_FieldCount; j++)
g_StringPool.FreeString(m_Rows[i][j]);
}
g_StringPool.StopHardLock();
}
void AtomicResult::FreeHandle()
{
_InternalClear();
}
void AtomicResult::CopyFrom(IResultSet *rs)
{
if (!m_IsFree)
{
_InternalClear();
}
m_IsFree = false;
m_FieldCount = rs->FieldCount();
m_RowCount = rs->RowCount();
if (m_RowCount > m_AllocRows)
{
/** allocate new array, zero it */
stridx_t **newRows = new stridx_t *[m_RowCount];
memset(newRows, 0, m_RowCount * sizeof(stridx_t *));
/** if we have a new field count, just delete all the old stuff. */
if (m_FieldCount > m_AllocFields)
{
for (unsigned int i=0; i<m_AllocRows; i++)
{
delete [] m_Rows[i];
newRows[i] = new stridx_t[m_FieldCount];
}
for (unsigned int i=m_AllocRows; i<m_RowCount; i++)
newRows[i] = new stridx_t[m_FieldCount];
} else {
/** copy the old pointers */
memcpy(newRows, m_Rows, m_AllocRows * sizeof(stridx_t *));
for (unsigned int i=m_AllocRows; i<m_RowCount; i++)
newRows[i] = new stridx_t[m_AllocFields];
}
delete [] m_Rows;
m_Rows = newRows;
m_AllocRows = m_RowCount;
}
if (m_FieldCount > m_AllocFields)
{
delete [] m_Fields;
m_Fields = new stridx_t[m_FieldCount];
m_AllocFields = m_FieldCount;
}
m_CurRow = 0;
g_StringPool.StartHardLock();
IResultRow *row;
unsigned int idx = 0;
while (!rs->IsDone())
{
row = rs->GetRow();
for (size_t i=0; i<m_FieldCount; i++)
m_Rows[idx][i] = g_StringPool.MakeString(row->GetString(i));
rs->NextRow();
idx++;
}
for (unsigned int i=0; i<m_FieldCount; i++)
m_Fields[i] = g_StringPool.MakeString(rs->FieldNumToName(i));
g_StringPool.StopHardLock();
}
/*********************
* STRING POOL STUFF *
*********************/
StringPool::StringPool()
{
m_mutex = NULL;
m_stoplock = false;
}
StringPool::~StringPool()
{
if (m_stoplock)
StopHardLock();
if (m_mutex)
UnsetMutex();
for (size_t i=0; i<m_Strings.size(); i++)
delete m_Strings[i];
m_Strings.clear();
m_UseTable.clear();
while (!m_FreeStrings.empty())
m_FreeStrings.pop();
}
bool StringPool::IsThreadable()
{
return (m_mutex != NULL);
}
const char *StringPool::GetString(stridx_t idx)
{
if (idx < 0 || idx >= (int)m_Strings.size() || !m_UseTable[idx])
return NULL;
return m_Strings[idx]->c_str();
}
void StringPool::FreeString(stridx_t idx)
{
if (idx < 0 || idx >= (int)m_Strings.size())
return;
if (!m_stoplock && m_mutex)
m_mutex->Lock();
if (m_UseTable[idx])
{
m_FreeStrings.push(idx);
m_UseTable[idx] = 0;
}
if (!m_stoplock && m_mutex)
m_mutex->Unlock();
}
stridx_t StringPool::MakeString(const char *str)
{
if (!str)
return StringPool::NullString;
if (!m_stoplock && m_mutex)
m_mutex->Lock();
stridx_t idx;
if (m_FreeStrings.empty())
{
idx = static_cast<stridx_t>(m_Strings.size());
SourceHook::String *shString = new SourceHook::String(str);
m_Strings.push_back(shString);
m_UseTable.push_back(1);
} else {
idx = m_FreeStrings.front();
m_FreeStrings.pop();
m_UseTable[idx] = 1;
m_Strings[idx]->assign(str);
}
if (!m_stoplock && m_mutex)
m_mutex->Unlock();
return idx;
}
void StringPool::SetMutex(IMutex *m)
{
m_mutex = m;
}
void StringPool::UnsetMutex()
{
if (m_mutex)
{
m_mutex->DestroyThis();
m_mutex = NULL;
}
}
void StringPool::StartHardLock()
{
if (m_stoplock)
return;
m_mutex->Lock();
m_stoplock = true;
}
void StringPool::StopHardLock()
{
if (!m_stoplock)
return;
m_mutex->Unlock();
m_stoplock = false;
}
AMX_NATIVE_INFO g_ThreadSqlNatives[] =
{
{"SQL_ThreadQuery", SQL_ThreadQuery},
{NULL, NULL},
};