[Webkit-unassigned] [Bug 87790] New: WTF TCSpinLock.h doesn't compile for x64 with Visual Studio

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87790

           Summary: WTF TCSpinLock.h doesn't compile for x64 with Visual
                    Studio
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows 7
            Status: UNCONFIRMED
          Severity: Trivial
          Priority: P4
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: alex.christensen at flexsim.com
                CC: paroga at paroga.com


The file Source/WTF/wtf/TCSpinLock.h contains assembly code with an __asm keyword that compiles with Visual Studio for x86, but not for x64.  Code that uses the intrinsic InterlockedExchange function has already been written below, but the #if incorrectly does not use it when MSVC is compiling for a 64 bit machine.  This can be fixed by changing line 37 from 

#if (CPU(X86) || CPU(X86_64) || CPU(PPC)) && (COMPILER(GCC) || COMPILER(MSVC))

 to 

#if (CPU(X86) || CPU(X86_64) || CPU(PPC)) && COMPILER(GCC) || CPU(X86) && COMPILER(MSVC)

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