+\r
+safe_ptr<host_buffer> ogl_device::allocate_host_buffer(size_t size, host_buffer::usage_t usage)\r
+{\r
+ std::shared_ptr<host_buffer> buffer;\r
+\r
+ try\r
+ {\r
+ buffer.reset(new host_buffer(size, usage));\r
+ if(usage == host_buffer::write_only)\r
+ buffer->map();\r
+ else\r
+ buffer->unmap(); \r
+ }\r
+ catch(...)\r
+ {\r
+ try\r
+ {\r
+ yield();\r
+ gc().wait();\r
+\r
+ // Try again\r
+ buffer.reset(new host_buffer(size, usage));\r
+ if(usage == host_buffer::write_only)\r
+ buffer->map();\r
+ else\r
+ buffer->unmap(); \r
+ }\r
+ catch(...)\r
+ {\r
+ CASPAR_LOG(error) << L"ogl: create_host_buffer failed!";\r
+ throw; \r
+ }\r
+ }\r
+\r
+ return make_safe(buffer);\r
+}\r