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54 lines
1.9 KiB
Nim
Executable File
54 lines
1.9 KiB
Nim
Executable File
#
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#
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# The Nimrod Compiler
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# (c) Copyright 2011 Andreas Rumpf
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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## Thread var support for crappy architectures that lack native support for
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## thread local storage.
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proc emulatedThreadVars(): bool {.inline.} =
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result = optThreads in gGlobalOptions
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# NOW: Use the work-around everywhere, because it should be faster anyway.
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#platform.OS[targetOS].props.contains(ospLacksThreadVars)
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proc AccessThreadLocalVar(p: BProc, s: PSym) =
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if emulatedThreadVars() and not p.ThreadVarAccessed:
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p.ThreadVarAccessed = true
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p.module.usesThreadVars = true
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appf(p.s[cpsLocals], "NimThreadVars* NimTV;$n")
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appcg(p, cpsInit, "NimTV=(NimThreadVars*)#GetThreadLocalVars();$n")
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var
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nimtv: PRope # nimrod thread vars
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nimtvDeps: seq[PType] = @[]
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nimtvDeclared = initIntSet()
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proc declareThreadVar(m: BModule, s: PSym, isExtern: bool) =
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if emulatedThreadVars():
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# we gather all thread locals var into a struct; we need to allocate
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# storage for that somehow, can't use the thread local storage
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# allocator for it :-(
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if not containsOrIncl(nimtvDeclared, s.id):
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nimtvDeps.add(s.loc.t)
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appf(nimtv, "$1 $2;$n", [getTypeDesc(m, s.loc.t), s.loc.r])
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else:
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if isExtern: app(m.s[cfsVars], "extern ")
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if optThreads in gGlobalOptions: app(m.s[cfsVars], "NIM_THREADVAR ")
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app(m.s[cfsVars], getTypeDesc(m, s.loc.t))
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appf(m.s[cfsVars], " $1;$n", [s.loc.r])
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proc generateThreadLocalStorage(m: BModule) =
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if nimtv != nil and (m.usesThreadVars or sfMainModule in m.module.flags):
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for t in items(nimtvDeps): discard getTypeDesc(m, t)
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appf(m.s[cfsSeqTypes], "typedef struct {$1} NimThreadVars;$n", [nimtv])
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proc GenerateThreadVarsSize(m: BModule) =
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if nimtv != nil:
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app(m.s[cfsProcs],
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"NI NimThreadVarsSize(){return (NI)sizeof(NimThreadVars);}" & tnl)
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