1 // This may look like C code, but it is really -*- C++ -*- 2 // 3 // Copyright Dirk Lemstra 2014 4 // 5 // Definition of resource limits. 6 // 7 8 #if !defined(Magick_ResourceLimits_header) 9 #define Magick_ResourceLimits_header 10 11 #include "Magick++/Include.h" 12 13 namespace Magick 14 { 15 class MagickPPExport ResourceLimits 16 { 17 public: 18 19 // Pixel cache limit in bytes. Requests for memory above this limit 20 // are automagically allocated on disk. 21 static void area(const MagickSizeType limit_); 22 static MagickSizeType area(void); 23 24 // Pixel cache limit in bytes. Requests for memory above this limit 25 // will fail. 26 static void disk(const MagickSizeType limit_); 27 static MagickSizeType disk(void); 28 29 // The maximum number of open pixel cache files. When this limit is 30 // exceeded, any subsequent pixels cached to disk are closed and reopened 31 // on demand. This behavior permits a large number of images to be accessed 32 // simultaneously on disk, but with a speed penalty due to repeated 33 // open/close calls. 34 static void file(const MagickSizeType limit_); 35 static MagickSizeType file(void); 36 37 // The maximum height of an image. 38 static void height(const MagickSizeType limit_); 39 static MagickSizeType height(void); 40 41 // Pixel cache limit in bytes. Once this memory limit is exceeded, 42 // all subsequent pixels cache operations are to/from disk. 43 static void map(const MagickSizeType limit_); 44 static MagickSizeType map(void); 45 46 // Pixel cache limit in bytes. Once this memory limit is exceeded, 47 // all subsequent pixels cache operations are to/from disk or to/from 48 // memory mapped files. 49 static void memory(const MagickSizeType limit_); 50 static MagickSizeType memory(void); 51 52 // Limits the number of threads used in multithreaded operations. 53 static void thread(const MagickSizeType limit_); 54 static MagickSizeType thread(void); 55 56 // Periodically yield the CPU for at least the time specified in 57 // milliseconds. 58 static void throttle(const MagickSizeType limit_); 59 static MagickSizeType throttle(void); 60 61 // The maximum width of an image. 62 static void width(const MagickSizeType limit_); 63 static MagickSizeType width(void); 64 65 private: 66 ResourceLimits(void); 67 68 }; // class ResourceLimits 69 70 } // Magick namespace 71 72 #endif // Magick_ResourceLimits_header 73