search for: memorymodel

Hi, Recently, I added some command line options to my pass like this: static llvm::cl::opt<MemMod> MemoryModel("mem-mod", llvm::cl::desc("Set the memory model:"), llvm::cl::values( clEnumVal(flat, "flat memory model"), clEnumVal(twodim, "two dimensional memory model"), clEnumValEnd)); This works perfectly on Linux and MacOS...

...Mode: 160 (0x0) ModeAttributes: 0x0 WinAAttributes: 0x0 WinBAttributes: 0x0 WinGranularity: 0 WinSize: 0 WinASegment: 0x0 WinBSegment: 0x0 WinFuncPtr: 0x0 BytesPerScanline: 0 XResolution: 0 YResolution: 0 XCharSize: 0 YCharSize: 0 NumberOfPlanes: 0 BitsPerPixel: 0 NumberOfBanks: 0 MemoryModel: 0 BankSize: 0 NumberOfImages: 0 RedMaskSize: 0 RedFieldPosition: 0 GreenMaskSize: 0 GreenFieldPosition: 0 BlueMaskSize: 0 BlueFieldPosition: 0 RsvdMaskSize: 0 RsvdFieldPosition: 0 DirectColorModeInfo: 0 PhysBasePtr: 0x0 LinBytesPerScanLine: 0 BnkNumberOfImagePages: 0 LinNumberOfImag...

...However, at least one case of thread-unsafety > (ManagedStatic), has proven very-difficult-to-impossible to implement > correctly without using lower-level operations. > Yes, double-checked locking is a pain. There's a C++ safe implementation in http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html in the "Making it work with explicit memory barriers" section. As far as I know, it is still considered to work. Luke > --Owen > > > ------------------------------------------------------------------------ > > ____________________________...

...hread-unsafety >> (ManagedStatic), has proven very-difficult-to-impossible to implement >> correctly without using lower-level operations. >> > > Yes, double-checked locking is a pain. There's a C++ safe > implementation > in > http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html > in the "Making it work with explicit memory barriers" section. As > far as > I know, it is still considered to work. Our problems are actually deeper than that, because we need to interact well with static constructors. This means that we can'...

On May 16, 2009, at 7:47 PM, Luke Dalessandro wrote: > Owen Anderson wrote: >> Some of you may have noticed that I addedd include/llvm/System/ >> Atomics.h >> to the repository briefly, which will be used for adding support for >> threading in LLVM. > > Just out of curiosity, is there a design document somewhere for the > plan > for threading? Not as

...WinASegment: 0xa000 WinBSegment: 0x0 WinFuncPtr: 0xc0009c53 BytesPerScanline: 1600 XResolution: 800 YResolution: 600 XCharSize: 8 YCharSize: 16 NumberOfPlanes: 1 BitsPerPixel: 16 NumberOfBanks: 1 MemoryModel: 6 BankSize: 0 NumberOfImages: 2 RedMaskSize: 5 RedFieldPosition: 11 GreenMaskSize: 6 GreenFieldPosition: 5 BlueMaskSize: 5 BlueFieldPosition: 0 RsvdMaskSize: 0 RsvdFieldPosition: 0 DirectColorModeInf...