SwitchToThread

関数

実行可能な他のスレッドへCPUを明け渡す。

DLLKERNEL32.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

BOOL SwitchToThread(void);

パラメーターなし。戻り値: BOOL

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

BOOL SwitchToThread(void);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", ExactSpelling = true)]
static extern bool SwitchToThread();

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function SwitchToThread() As Boolean
End Function

Declare PtrSafe Function SwitchToThread Lib "kernel32" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SwitchToThread = ctypes.windll.kernel32.SwitchToThread
SwitchToThread.restype = wintypes.BOOL
SwitchToThread.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SwitchToThread = Fiddle::Function.new(
  lib['SwitchToThread'],
  [],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SwitchToThread() -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll")]
public static extern bool SwitchToThread();
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SwitchToThread' -Namespace Win32 -PassThru
# $api::SwitchToThread()

#uselib "KERNEL32.dll"
#func global SwitchToThread "SwitchToThread"
; SwitchToThread   ; 戻り値は stat
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "KERNEL32.dll"
#cfunc global SwitchToThread "SwitchToThread"
; res = SwitchToThread()

; BOOL SwitchToThread()
#uselib "KERNEL32.dll"
#cfunc global SwitchToThread "SwitchToThread"
; res = SwitchToThread()

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSwitchToThread = kernel32.NewProc("SwitchToThread")
)

r1, _, err := procSwitchToThread.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SwitchToThread: BOOL; stdcall;
  external 'KERNEL32.dll' name 'SwitchToThread';

result := DllCall("KERNEL32\SwitchToThread", "Int")

●SwitchToThread() = DLL("KERNEL32.dll", "bool SwitchToThread()")
# 呼び出し: SwitchToThread()
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。