JsRelease

関数

Chakra参照オブジェクトの参照カウントを減らす。

DLLchakra.dll呼出規約winapi

シグネチャ

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

JsErrorCode JsRelease(
    void* ref,
    DWORD* count   // optional
);

パラメーター

名前	型	方向
ref	void*	in
count	DWORD*	outoptional

戻り値の型: JsErrorCode

各言語での呼び出し定義

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

JsErrorCode JsRelease(
    void* ref,
    DWORD* count   // optional
);

[DllImport("chakra.dll", ExactSpelling = true)]
static extern uint JsRelease(
    IntPtr ref,   // void*
    IntPtr count   // DWORD* optional, out
);

<DllImport("chakra.dll", ExactSpelling:=True)>
Public Shared Function JsRelease(
    ref As IntPtr,   ' void*
    count As IntPtr   ' DWORD* optional, out
) As UInteger
End Function

' ref : void*
' count : DWORD* optional, out
Declare PtrSafe Function JsRelease Lib "chakra" ( _
    ByVal ref As LongPtr, _
    ByVal count As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

JsRelease = ctypes.windll.chakra.JsRelease
JsRelease.restype = wintypes.DWORD
JsRelease.argtypes = [
    ctypes.POINTER(None),  # ref : void*
    ctypes.POINTER(wintypes.DWORD),  # count : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('chakra.dll')
JsRelease = Fiddle::Function.new(
  lib['JsRelease'],
  [
    Fiddle::TYPE_VOIDP,  # ref : void*
    Fiddle::TYPE_VOIDP,  # count : DWORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "chakra")]
extern "system" {
    fn JsRelease(
        ref: *mut (),  // void*
        count: *mut u32  // DWORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("chakra.dll")]
public static extern uint JsRelease(IntPtr ref, IntPtr count);
"@
$api = Add-Type -MemberDefinition $sig -Name 'chakra_JsRelease' -Namespace Win32 -PassThru
# $api::JsRelease(ref, count)

#uselib "chakra.dll"
#func global JsRelease "JsRelease" sptr, sptr
; JsRelease ref, varptr(count)   ; 戻り値は stat
; ref : void* -> "sptr"
; count : DWORD* optional, out -> "sptr"
; ※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。

出力引数:

#uselib "chakra.dll"
#cfunc global JsRelease "JsRelease" sptr, var
; res = JsRelease(ref, count)
; ref : void* -> "sptr"
; count : DWORD* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "chakra.dll"
#cfunc global JsRelease "JsRelease" sptr, sptr
; res = JsRelease(ref, varptr(count))
; ref : void* -> "sptr"
; count : DWORD* optional, out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; JsErrorCode JsRelease(void* ref, DWORD* count)
#uselib "chakra.dll"
#cfunc global JsRelease "JsRelease" intptr, var
; res = JsRelease(ref, count)
; ref : void* -> "intptr"
; count : DWORD* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; JsErrorCode JsRelease(void* ref, DWORD* count)
#uselib "chakra.dll"
#cfunc global JsRelease "JsRelease" intptr, intptr
; res = JsRelease(ref, varptr(count))
; ref : void* -> "intptr"
; count : DWORD* optional, out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	chakra = windows.NewLazySystemDLL("chakra.dll")
	procJsRelease = chakra.NewProc("JsRelease")
)

// ref (void*), count (DWORD* optional, out)
r1, _, err := procJsRelease.Call(
	uintptr(ref),
	uintptr(count),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // JsErrorCode

function JsRelease(
  ref: Pointer;   // void*
  count: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsRelease';

result := DllCall("chakra\JsRelease"
    , "Ptr", ref   ; void*
    , "Ptr", count   ; DWORD* optional, out
    , "UInt")   ; return: JsErrorCode

●JsRelease(ref, count) = DLL("chakra.dll", "dword JsRelease(void*, void*)")
# 呼び出し: JsRelease(ref, count)
# ref : void* -> "void*"
# count : DWORD* optional, out -> "void*"
# 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)。