@NonnullDefault

Package org.lwjgl.system.jemalloc

Contains bindings to the jemalloc library. jemalloc is a general purpose malloc implementation that emphasizes fragmentation avoidance and scalable concurrency support.

The jemalloc documentation can be found here. The jemalloc wiki also contains useful information.

The jemalloc shared library that comes with LWJGL is configured with:

• --with-jemalloc-prefix=je_
• --enable-lazy-lock (Linux)
• --disable-stats
• --disable-fill
• --disable-cxx
• --disable-initial-exec-tls (Linux & macOS)
• --disable-zone-allocator (macOS)

The shared library may be replaced with a custom build that has more features enabled.

Dynamic configuration (for enabled features) is also possible, using either the MALLOC_CONF environment variable or the MALLCTL NAMESPACE and the mallctl* functions.

Interface Summary

Interface	Description
ExtentAllocI	Instances of this interface may be set to the ExtentHooks struct.
ExtentCommitI	Instances of this interface may be set to the ExtentHooks struct.
ExtentDallocI	Instances of this interface may be set to the ExtentHooks struct.
ExtentDecommitI	Instances of this interface may be set to the ExtentHooks struct.
ExtentDestroyI	Instances of this interface may be set to the ExtentHooks struct.
ExtentMergeI	Instances of this interface may be set to the ExtentHooks struct.
ExtentPurgeI	Instances of this interface may be set to the ExtentHooks struct.
ExtentSplitI	Instances of this interface may be set to the ExtentHooks struct.
MallocMessageCallbackI	Instances of this interface may be passed to the malloc_usable_size method.

Class Summary

Class	Description
ExtentAlloc	Instances of this class may be set to the ExtentHooks struct.
ExtentCommit	Instances of this class may be set to the ExtentHooks struct.
ExtentDalloc	Instances of this class may be set to the ExtentHooks struct.
ExtentDecommit	Instances of this class may be set to the ExtentHooks struct.
ExtentDestroy	Instances of this class may be set to the ExtentHooks struct.
ExtentHooks	The extent_hooks_t structure comprises function pointers which are described individually below.
ExtentMerge	Instances of this class may be set to the ExtentHooks struct.
ExtentPurge	Instances of this class may be set to the ExtentHooks struct.
ExtentSplit	Instances of this class may be set to the ExtentHooks struct.
JEmalloc	Native bindings to jemalloc.
JEmalloc.Functions	Contains the function pointers loaded from the jemalloc SharedLibrary.
JEmallocAllocator	A MemoryUtil.MemoryAllocator implementation using the jemalloc library.
MallocMessageCallback	Instances of this class may be passed to the malloc_usable_size method.