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when defined(windows):
type
SysThread* = Handle
WinThreadProc = proc (x: pointer): int32 {.stdcall.}
proc createThread(lpThreadAttributes: pointer, dwStackSize: int32,
lpStartAddress: WinThreadProc,
lpParameter: pointer,
dwCreationFlags: int32,
lpThreadId: var int32): SysThread {.
stdcall, dynlib: "kernel32", importc: "CreateThread".}
proc winSuspendThread(hThread: SysThread): int32 {.
stdcall, dynlib: "kernel32", importc: "SuspendThread".}
proc winResumeThread(hThread: SysThread): int32 {.
stdcall, dynlib: "kernel32", importc: "ResumeThread".}
proc waitForMultipleObjects(nCount: int32,
lpHandles: ptr SysThread,
bWaitAll: int32,
dwMilliseconds: int32): int32 {.
stdcall, dynlib: "kernel32", importc: "WaitForMultipleObjects".}
proc terminateThread(hThread: SysThread, dwExitCode: int32): int32 {.
stdcall, dynlib: "kernel32", importc: "TerminateThread".}
proc getCurrentThreadId(): int32 {.
stdcall, dynlib: "kernel32", importc: "GetCurrentThreadId".}
type
ThreadVarSlot = distinct int32
when true:
proc threadVarAlloc(): ThreadVarSlot {.
importc: "TlsAlloc", stdcall, header: "<windows.h>".}
proc threadVarSetValue(dwTlsIndex: ThreadVarSlot, lpTlsValue: pointer) {.
importc: "TlsSetValue", stdcall, header: "<windows.h>".}
proc tlsGetValue(dwTlsIndex: ThreadVarSlot): pointer {.
importc: "TlsGetValue", stdcall, header: "<windows.h>".}
proc getLastError(): uint32 {.
importc: "GetLastError", stdcall, header: "<windows.h>".}
proc setLastError(x: uint32) {.
importc: "SetLastError", stdcall, header: "<windows.h>".}
proc threadVarGetValue(dwTlsIndex: ThreadVarSlot): pointer =
let realLastError = getLastError()
result = tlsGetValue(dwTlsIndex)
setLastError(realLastError)
else:
proc threadVarAlloc(): ThreadVarSlot {.
importc: "TlsAlloc", stdcall, dynlib: "kernel32".}
proc threadVarSetValue(dwTlsIndex: ThreadVarSlot, lpTlsValue: pointer) {.
importc: "TlsSetValue", stdcall, dynlib: "kernel32".}
proc threadVarGetValue(dwTlsIndex: ThreadVarSlot): pointer {.
importc: "TlsGetValue", stdcall, dynlib: "kernel32".}
proc setThreadAffinityMask(hThread: SysThread, dwThreadAffinityMask: uint) {.
importc: "SetThreadAffinityMask", stdcall, header: "<windows.h>".}
elif defined(genode):
import genode/env
const
GenodeHeader = "genode_cpp/threads.h"
type
SysThread* {.importcpp: "Nim::SysThread",
header: GenodeHeader, final, pure.} = object
GenodeThreadProc = proc (x: pointer) {.noconv.}
ThreadVarSlot = int
proc initThread(s: var SysThread,
env: GenodeEnv,
stackSize: culonglong,
entry: GenodeThreadProc,
arg: pointer,
affinity: cuint) {.
importcpp: "#.initThread(@)".}
proc threadVarAlloc(): ThreadVarSlot = 0
proc offMainThread(): bool {.
importcpp: "Nim::SysThread::offMainThread",
header: GenodeHeader.}
proc threadVarSetValue(value: pointer) {.
importcpp: "Nim::SysThread::threadVarSetValue(@)",
header: GenodeHeader.}
proc threadVarGetValue(): pointer {.
importcpp: "Nim::SysThread::threadVarGetValue()",
header: GenodeHeader.}
var mainTls: pointer
proc threadVarSetValue(s: ThreadVarSlot, value: pointer) {.inline.} =
if offMainThread():
threadVarSetValue(value);
else:
mainTls = value
proc threadVarGetValue(s: ThreadVarSlot): pointer {.inline.} =
if offMainThread():
threadVarGetValue();
else:
mainTls
else:
when not (defined(macosx) or defined(haiku)):
{.passl: "-pthread".}
when not defined(haiku):
{.passc: "-pthread".}
const
schedh = "#define _GNU_SOURCE\n#include <sched.h>"
pthreadh = "#define _GNU_SOURCE\n#include <pthread.h>"
when not declared(Time):
when defined(linux):
type Time = clong
else:
type Time = int
when (defined(linux) or defined(nintendoswitch)) and defined(amd64):
type
SysThread* {.importc: "pthread_t",
header: "<sys/types.h>" .} = distinct culong
Pthread_attr {.importc: "pthread_attr_t",
header: "<sys/types.h>".} = object
abi: array[56 div sizeof(clong), clong]
ThreadVarSlot {.importc: "pthread_key_t",
header: "<sys/types.h>".} = distinct cuint
elif defined(openbsd) and defined(amd64):
type
SysThread* {.importc: "pthread_t", header: "<pthread.h>".} = object
Pthread_attr {.importc: "pthread_attr_t",
header: "<pthread.h>".} = object
ThreadVarSlot {.importc: "pthread_key_t",
header: "<pthread.h>".} = cint
else:
type
SysThread* {.importc: "pthread_t", header: "<sys/types.h>".} = object
Pthread_attr {.importc: "pthread_attr_t",
header: "<sys/types.h>".} = object
ThreadVarSlot {.importc: "pthread_key_t",
header: "<sys/types.h>".} = object
type
Timespec {.importc: "struct timespec", header: "<time.h>".} = object
tv_sec: Time
tv_nsec: clong
proc pthread_attr_init(a1: var Pthread_attr): cint {.
importc, header: pthreadh.}
proc pthread_attr_setstacksize(a1: var Pthread_attr, a2: int): cint {.
importc, header: pthreadh.}
proc pthread_attr_destroy(a1: var Pthread_attr): cint {.
importc, header: pthreadh.}
proc pthread_create(a1: var SysThread, a2: var Pthread_attr,
a3: proc (x: pointer): pointer {.noconv.},
a4: pointer): cint {.importc: "pthread_create",
header: pthreadh.}
proc pthread_join(a1: SysThread, a2: ptr pointer): cint {.
importc, header: pthreadh.}
proc pthread_cancel(a1: SysThread): cint {.
importc: "pthread_cancel", header: pthreadh.}
proc pthread_getspecific(a1: ThreadVarSlot): pointer {.
importc: "pthread_getspecific", header: pthreadh.}
proc pthread_key_create(a1: ptr ThreadVarSlot,
destruct: proc (x: pointer) {.noconv.}): int32 {.
importc: "pthread_key_create", header: pthreadh.}
proc pthread_key_delete(a1: ThreadVarSlot): int32 {.
importc: "pthread_key_delete", header: pthreadh.}
proc pthread_setspecific(a1: ThreadVarSlot, a2: pointer): int32 {.
importc: "pthread_setspecific", header: pthreadh.}
proc threadVarAlloc(): ThreadVarSlot {.inline.} =
discard pthread_key_create(addr(result), nil)
proc threadVarSetValue(s: ThreadVarSlot, value: pointer) {.inline.} =
discard pthread_setspecific(s, value)
proc threadVarGetValue(s: ThreadVarSlot): pointer {.inline.} =
result = pthread_getspecific(s)
type CpuSet {.importc: "cpu_set_t", header: schedh.} = object
when defined(linux) and defined(amd64):
abi: array[1024 div (8 * sizeof(culong)), culong]
proc cpusetZero(s: var CpuSet) {.importc: "CPU_ZERO", header: schedh.}
proc cpusetIncl(cpu: cint; s: var CpuSet) {.
importc: "CPU_SET", header: schedh.}
proc setAffinity(thread: SysThread; setsize: csize_t; s: var CpuSet) {.
importc: "pthread_setaffinity_np", header: pthreadh.}
const
emulatedThreadVars = compileOption("tlsEmulation")
when emulatedThreadVars:
# the compiler generates this proc for us, so that we can get the size of
# the thread local var block; we use this only for sanity checking though
proc nimThreadVarsSize(): int {.noconv, importc: "NimThreadVarsSize".}
# we preallocate a fixed size for thread local storage, so that no heap
# allocations are needed. Currently less than 16K are used on a 64bit machine.
# We use `float` for proper alignment:
const nimTlsSize {.intdefine.} = 16000
type
ThreadLocalStorage = array[0..(nimTlsSize div sizeof(float)), float]
PGcThread = ptr GcThread
GcThread {.pure, inheritable.} = object
when emulatedThreadVars:
tls: ThreadLocalStorage
else:
nil
when hasSharedHeap:
next, prev: PGcThread
stackBottom, stackTop: pointer
stackSize: int
else:
nil
when emulatedThreadVars:
var globalsSlot: ThreadVarSlot
when not defined(useNimRtl):
var mainThread: GcThread
proc GetThreadLocalVars(): pointer {.compilerRtl, inl.} =
result = addr(cast[PGcThread](threadVarGetValue(globalsSlot)).tls)
proc initThreadVarsEmulation() {.compilerproc, inline.} =
when not defined(useNimRtl):
globalsSlot = threadVarAlloc()
when declared(mainThread):
threadVarSetValue(globalsSlot, addr(mainThread))
when not defined(useNimRtl):
when emulatedThreadVars:
if nimThreadVarsSize() > sizeof(ThreadLocalStorage):
c_fprintf(cstderr, """too large thread local storage size requested,
use -d:\"nimTlsSize=X\" to setup even more or stop using unittest.nim""")
quit 1
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