Mercurial > hg > orthanc-webviewer
diff Orthanc/Core/SQLite/StatementReference.cpp @ 25:15acbf5e7545
refactoring
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 02 Jun 2015 11:16:30 +0200 |
parents | |
children | 78aa0a355d3a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Orthanc/Core/SQLite/StatementReference.cpp Tue Jun 02 11:16:30 2015 +0200 @@ -0,0 +1,152 @@ +/** + * Orthanc - A Lightweight, RESTful DICOM Store + * + * Copyright (C) 2012-2015 Sebastien Jodogne <s.jodogne@gmail.com>, + * Medical Physics Department, CHU of Liege, Belgium + * + * Copyright (c) 2012 The Chromium Authors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc., the name of the CHU of Liege, + * nor the names of its contributors may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **/ + + +#if ORTHANC_SQLITE_STANDALONE != 1 +#include "../PrecompiledHeaders.h" +#endif + +#include "StatementReference.h" +#include "OrthancSQLiteException.h" + +#if ORTHANC_SQLITE_STANDALONE != 1 +#include <glog/logging.h> +#endif + +#include <string> +#include <cassert> +#include "sqlite3.h" + +namespace Orthanc +{ + namespace SQLite + { + bool StatementReference::IsRoot() const + { + return root_ == NULL; + } + + StatementReference::StatementReference() + { + root_ = NULL; + refCount_ = 0; + statement_ = NULL; + assert(IsRoot()); + } + + StatementReference::StatementReference(sqlite3* database, + const char* sql) + { + if (database == NULL || sql == NULL) + { + throw OrthancSQLiteException("Parameter out of range"); + } + + root_ = NULL; + refCount_ = 0; + + int error = sqlite3_prepare_v2(database, sql, -1, &statement_, NULL); + if (error != SQLITE_OK) + { + throw OrthancSQLiteException("SQLite: " + std::string(sqlite3_errmsg(database))); + } + + assert(IsRoot()); + } + + StatementReference::StatementReference(StatementReference& other) + { + refCount_ = 0; + + if (other.IsRoot()) + { + root_ = &other; + } + else + { + root_ = other.root_; + } + + root_->refCount_++; + statement_ = root_->statement_; + + assert(!IsRoot()); + } + + StatementReference::~StatementReference() + { + if (IsRoot()) + { + if (refCount_ != 0) + { + // There remain references to this object. We cannot throw + // an exception because: + // http://www.parashift.com/c++-faq/dtors-shouldnt-throw.html + +#if ORTHANC_SQLITE_STANDALONE != 1 + LOG(ERROR) << "Bad value of the reference counter"; +#endif + } + else if (statement_ != NULL) + { + sqlite3_finalize(statement_); + } + } + else + { + if (root_->refCount_ == 0) + { + // There remain references to this object. We cannot throw + // an exception because: + // http://www.parashift.com/c++-faq/dtors-shouldnt-throw.html + +#if ORTHANC_SQLITE_STANDALONE != 1 + LOG(ERROR) << "Bad value of the reference counter"; +#endif + } + else + { + root_->refCount_--; + } + } + } + + uint32_t StatementReference::GetReferenceCount() const + { + return refCount_; + } + } +}