在Java应用程序中,通过JNI调用C++ DLL时,为了最好地分配内存,可以遵循以下步骤:
extern "C" __declspec(dllexport) void* allocateMemory(size_t size) {
return malloc(size);
}
javah
工具生成这个头文件。public class MemoryAllocator {
public native long allocateMemory(long size);
}
allocateMemory
函数。public class MemoryAllocator {
static {
System.loadLibrary("MemoryAllocator");
}
public native long allocateMemory(long size);
}
MemoryAllocator
类分配内存。MemoryAllocator allocator = new MemoryAllocator();
long memorySize = 1024; // 要分配的内存大小,单位为字节
long allocatedMemory = allocator.allocateMemory(memorySize);
extern "C" __declspec(dllexport) void freeMemory(void* ptr) {
free(ptr);
}
freeMemory
函数。public class MemoryAllocator {
static {
System.loadLibrary("MemoryAllocator");
}
public native long allocateMemory(long size);
public native void freeMemory(long ptr);
}
MemoryAllocator
类释放内存。MemoryAllocator allocator = new MemoryAllocator();
long memorySize = 1024; // 要分配的内存大小,单位为字节
long allocatedMemory = allocator.allocateMemory(memorySize);
// 使用内存...
allocator.freeMemory(allocatedMemory);
通过以上步骤,可以在Java应用程序中通过JNI调用C++ DLL,最好地分配内存。
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