155. Introducing memory segment view VarHandle Let’s consider the following simple memory segment for storing an int (arena is an instance of Arena): MemorySegment segment = arena.allocate(ValueLayout.JAVA_INT); We know that ... Read MoreRead More
Adding explicit extra space (explicit padding) to validate alignment Let’s consider the following C-like struct (let’s denote this as Case 1): StructLayout product = MemoryLayout.structLayout( ValueLayout.JAVA_INT.withName(“sku”), ValueLayout.JAVA_CHAR.withName(“energy”), ValueLayout.JAVA_BYTE.withName(“weight”)); The product ... Read MoreRead More
157. Tackling mapped memory segments We know that a computer has limited physical memory referred to as RAM memory. Common sense though tells us that we cannot allocate a memory ... Read MoreRead More
Hooking stride The minimum byte-distance between two member layouts is called stride. The stride can be greater than or equal to the size. When we don’t face any alignment issues ... Read MoreRead More
Copying a part of the segment into another segment (2) Let’s consider the srcSegment (1, 2, 3, 4, -1, -1, -1, 52, 22, 33, -1, -1, -1, -1, -1, 4) ... Read MoreRead More
149. Copying and slicing memory segments Let’s consider the following memory segment (arena is an instance of Arena): MemorySegment srcSegment = arena.allocateArray( ValueLayout.JAVA_INT, 1, 2, 3, 4, -1, -1, -1, ... Read MoreRead More
158. Introducing Foreign Linker API The main goal of Foreign Linker API is to provide a robust and easy-to-use API (no need to write C/C++ code) for sustaining interoperability between ... Read MoreRead More
159. Calling the sumTwoInt() foreign function Do you remember the sumTwoInt() function? We have defined this C function in a native shared library named math.dll (check Problems 137, 138, and ... Read MoreRead More
150. Tackling the slicing allocator Let’s consider the following three Java regular int arrays: int[] arr1 = new int[]{1, 2, 3, 4, 5, 6};int[] arr2 = new int[]{7, 8, 9};int[] ... Read MoreRead More
161. Calling the strcat() foreign function The strcat() foreign function is part of the C standard library and it has the following signature (https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/strcat-wcscat-mbscat): char *strcat(char *strDestination, const char *strSource); ... Read MoreRead More