org.lwjgl.system.jemalloc.ExtentDallocI Maven / Gradle / Ivy

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A general purpose malloc implementation that emphasizes fragmentation avoidance and scalable concurrency support.

There is a newer version: 3.3.4

/*
 * Copyright LWJGL. All rights reserved.
 * License terms: https://www.lwjgl.org/license
 * MACHINE GENERATED FILE, DO NOT EDIT
 */
package org.lwjgl.system.jemalloc;

import org.lwjgl.system.*;
import org.lwjgl.system.libffi.*;

import static org.lwjgl.system.APIUtil.*;
import static org.lwjgl.system.MemoryUtil.*;
import static org.lwjgl.system.libffi.LibFFI.*;

/**
 * Instances of this interface may be set to the {@link ExtentHooks} struct.
 * 
 * Type
 * 
 * 
 * bool (*{@link #invoke}) (
 *     extent_hooks_t *extent_hooks,
 *     void *addr,
 *     size_t size,
 *     bool committed,
 *     unsigned int arena_ind
 * )
 */
@FunctionalInterface
@NativeType("extent_dalloc_t")
public interface ExtentDallocI extends CallbackI {

    FFICIF CIF = apiCreateCIF(
        FFI_DEFAULT_ABI,
        ffi_type_uint8,
        ffi_type_pointer, ffi_type_pointer, ffi_type_pointer, ffi_type_uint8, ffi_type_uint32
    );

    @Override
    default FFICIF getCallInterface() { return CIF; }

    @Override
    default void callback(long ret, long args) {
        boolean __result = invoke(
            memGetAddress(memGetAddress(args)),
            memGetAddress(memGetAddress(args + POINTER_SIZE)),
            memGetAddress(memGetAddress(args + 2 * POINTER_SIZE)),
            memGetByte(memGetAddress(args + 3 * POINTER_SIZE)) != 0,
            memGetInt(memGetAddress(args + 4 * POINTER_SIZE))
        );
        apiClosureRet(ret, __result);
    }

    /**
     * Extent deallocation hook.
     * 
     * An extent deallocation function conforms to the {@code extent_dalloc_t} type and deallocates an extent at given {@code addr} and {@code size} with
     * {@code committed}/decommited memory as indicated, on behalf of arena {@code arena_ind}, returning false upon success. If the function returns true, this
     * indicates opt-out from deallocation; the virtual memory mapping associated with the extent remains mapped, in the same commit state, and available for
     * future use, in which case it will be automatically retained for later reuse.
     */
    @NativeType("bool") boolean invoke(@NativeType("extent_hooks_t *") long extent_hooks, @NativeType("void *") long addr, @NativeType("size_t") long size, @NativeType("bool") boolean committed, @NativeType("unsigned int") int arena_ind);

}