mirror of
https://github.com/nim-lang/Nim.git
synced 2025-12-28 17:04:41 +00:00
65 lines
2.4 KiB
Nim
65 lines
2.4 KiB
Nim
#
|
|
#
|
|
# 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 architectures that lack native support for
|
|
## thread local storage.
|
|
|
|
# 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 threadVarAccessed notin p.flags:
|
|
p.flags.incl threadVarAccessed
|
|
incl p.module.flags, usesThreadVars
|
|
p.procSec(cpsLocals).addVar(kind = Local,
|
|
name = "NimTV_",
|
|
typ = ptrType("NimThreadVars"))
|
|
p.procSec(cpsInit).addAssignment("NimTV_",
|
|
cCast(ptrType("NimThreadVars"),
|
|
cCall(cgsymValue(p.module, "GetThreadLocalVars"))))
|
|
|
|
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)
|
|
m.g.nimtv.addField(name = s.loc.snippet, typ = getTypeDesc(m, s.loc.t))
|
|
else:
|
|
let vis =
|
|
if isExtern: Extern
|
|
elif lfExportLib in s.loc.flags: ExportLibVar
|
|
else: Private
|
|
m.s[cfsVars].addVar(m, s,
|
|
name = s.loc.snippet,
|
|
typ = getTypeDesc(m, s.loc.t),
|
|
kind = Threadvar,
|
|
visibility = vis)
|
|
|
|
proc generateThreadLocalStorage(m: BModule) =
|
|
if m.g.nimtv.buf.len != 0 and (usesThreadVars in m.flags or sfMainModule in m.module.flags):
|
|
for t in items(m.g.nimtvDeps): discard getTypeDesc(m, t)
|
|
finishTypeDescriptions(m)
|
|
m.s[cfsSeqTypes].addTypedef(name = "NimThreadVars"):
|
|
m.s[cfsSeqTypes].addSimpleStruct(m, name = "", baseType = ""):
|
|
m.s[cfsSeqTypes].add(extract(m.g.nimtv))
|
|
|
|
proc generateThreadVarsSize(m: BModule) =
|
|
if m.g.nimtv.buf.len != 0:
|
|
let externc = if m.config.backend == backendCpp or
|
|
sfCompileToCpp in m.module.flags: ExternC
|
|
else: None
|
|
m.s[cfsProcs].addDeclWithVisibility(externc):
|
|
m.s[cfsProcs].addProcHeader("NimThreadVarsSize", NimInt, cProcParams())
|
|
m.s[cfsProcs].finishProcHeaderWithBody():
|
|
m.s[cfsProcs].addReturn(cCast(NimInt, cSizeof("NimThreadVars")))
|