A pointer must be the same size as a native pointer on the current platform.
指针的大小必须与当前平台上的本机指针的大小相同。
Systems with native 32-bit types often kept both long and pointer sizes 32 bit, but introduced a new type, "long long," which was 64 bit.
本身支持32位类型的系统通常都保留32位的long和指针，不过这些系统引入了一个新类型 “long long”，它是 64 位的。
Systems with native 64-bit types often went to a model called "LP64," where the long and pointer sizes were both 64 bit.
本身支持64位类型的系统通常都采用一种称为“LP64”的模型，其中long类型和指针大小都是64位的。
Pointer to the callback function table of the native application.
指向本地应用程序的回调函数表。
JNIEnv *env; /* pointer to native method interface */
JNIEnv *env; /*指向本地方法调用接口 */
Gets the native code offset location to which the instruction pointer is currently set.
获取当前设置的指令指针所指向的本机代码偏移量位置。
Unmanaged APIs that take functions Pointers as arguments can be called from managed code with a managed delegate in place of the native function pointer.
可以使用托管委托取代本机函数指针来从托管代码中调用以函数指针作为参数的非托管api。
Gets a value that indicates whether it is safe to set the instruction pointer to the specified offset location in native code.
取得值，指出将指令指标设定为机器码中指定的位移位置是否安全。
Sets the instruction pointer to the specified offset location in native code.
设定指令指标，指向机器码中所指定的位移位置。
Sets the instruction pointer to the specified offset location in native code.
设定指令指标，指向机器码中所指定的位移位置。
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