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#
#
# The Nim Compiler
# (c) Copyright 2012 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## Thread var support for crappy architectures that lack native support for
## thread local storage. (**Thank you Mac OS X!**)
# included from cgen.nim
proc emulatedThreadVars(conf: ConfigRef): bool =
result = {optThreads, optTlsEmulation} <= conf.globalOptions
proc accessThreadLocalVar(p: BProc, s: PSym) =
if emulatedThreadVars(p.config) and not p.threadVarAccessed:
p.threadVarAccessed = true
incl p.module.flags, usesThreadVars
addf(p.procSec(cpsLocals), "\tNimThreadVars* NimTV_;$n", [])
add(p.procSec(cpsInit),
ropecg(p.module, "\tNimTV_ = (NimThreadVars*) #GetThreadLocalVars();$n", []))
proc declareThreadVar(m: BModule, s: PSym, isExtern: bool) =
if emulatedThreadVars(m.config):
# we gather all thread locals var into a struct; we need to allocate
# storage for that somehow, can't use the thread local storage
# allocator for it :-(
if not containsOrIncl(m.g.nimtvDeclared, s.id):
m.g.nimtvDeps.add(s.loc.t)
addf(m.g.nimtv, "$1 $2;$n", [getTypeDesc(m, s.loc.t), s.loc.r])
else:
if isExtern: add(m.s[cfsVars], "extern ")
if optThreads in m.config.globalOptions: add(m.s[cfsVars], "NIM_THREADVAR ")
add(m.s[cfsVars], getTypeDesc(m, s.loc.t))
addf(m.s[cfsVars], " $1;$n", [s.loc.r])
proc generateThreadLocalStorage(m: BModule) =
if m.g.nimtv != nil and (usesThreadVars in m.flags or sfMainModule in m.module.flags):
for t in items(m.g.nimtvDeps): discard getTypeDesc(m, t)
addf(m.s[cfsSeqTypes], "typedef struct {$1} NimThreadVars;$n", [m.g.nimtv])
proc generateThreadVarsSize(m: BModule) =
if m.g.nimtv != nil:
let externc = if m.config.cmd == cmdCompileToCpp or
sfCompileToCpp in m.module.flags: "extern \"C\" "
else: ""
addf(m.s[cfsProcs],
"$#NI NimThreadVarsSize(){return (NI)sizeof(NimThreadVars);}$n",
[externc.rope])
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