Added OclContext class.

src/backend/opencl/wrappers/OclContext.cpp

@@ -0,0 +1,58 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "backend/opencl/wrappers/OclLib.h"
+#include "backend/opencl/wrappers/OclContext.h"
+
+
+xmrig::OclContext::~OclContext()
+{
+    if (m_ctx) {
+        OclLib::releaseContext(m_ctx);
+    }
+}
+
+
+bool xmrig::OclContext::init(const std::vector<OclDevice> &devices, std::vector<OclLaunchData> &threads)
+{
+    if (!m_ctx) {
+        std::vector<cl_device_id> ids(devices.size());
+        for (size_t i = 0; i < devices.size(); ++i) {
+            ids[i] = devices[i].id();
+        }
+
+        m_ctx = OclLib::createContext(ids);
+    }
+
+    if (!m_ctx) {
+        return false;
+    }
+
+    for (OclLaunchData &data : threads) {
+        data.ctx = m_ctx;
+    }
+
+    return true;
+}