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2026-06-10

从散列读结果中读取数据 - DmaScatterRead ​

函数简介 ​

从散列读结果中读取指定地址的数据。(高级版功能,普通版无法使用)

接口名称 ​

DmaScatterRead

DLL调用 ​

c
int32_t OLA_CALL_TYPE DmaScatterRead(int64_t instance, int64_t scatterHandle, int64_t address, int64_t buffer, int32_t size);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
scatterHandle长整数型散列句柄，由 DmaScatterCreate 返回
address长整数型要读取的地址，必须是之前通过 DmaScatterPrepare 准备过的地址
buffer长整数型输出缓冲区地址，可为 NULL
size整数型读取大小，必须与 DmaScatterPrepare 中指定的大小一致

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int ret = ola.DmaScatterRead(0, 0, 0, 0);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
int ret = ola.DmaScatterRead(0, 0, 0, 0);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
ret = ola.DmaScatterRead(0, 0, 0, 0)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
int ret = ola.DmaScatterRead(0, 0, 0, 0);
cpp
var ola = com("OlaPlug.OlaSoft")
var ret = ola.DmaScatterRead(0, 0, 0, 0)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
ret = ola.DmaScatterRead(0, 0, 0, 0)
text
.局部变量 ola, OLAPlug
ola.创建 ()
ret ＝ ola.DmaScatterRead(0, 0, 0, 0)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var ret = ola.DmaScatterRead(0, 0, 0, 0);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
整数 ret = ola.DmaScatterRead(0, 0, 0, 0)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int32_t ret = ola.DmaScatterRead(0, 0, 0, 0);

原生 DLL 调用 ​

cpp
DmaScatterRead(instance, 0, 0, 0, 0);
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int DmaScatterRead(long ola, int scatterHandle, int address, int buffer, int size);

DmaScatterRead(instance, 0, 0, 0, 0);
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
ola.DmaScatterRead(instance, 0, 0, 0, 0)

返回值 ​

整数型：成功返回实际读取的字节数，失败返回 0。