Modules: added "js_shared_array_zone" directive.

[xeioex]

No description provided.

[Copilot]

Pull request overview

This pull request adds SharedArrayBuffer and Atomics support to the njs JavaScript engine, including integration with nginx through the new "js_shared_array_zone" directive.

Changes:

• Implements SharedArrayBuffer as a new value type alongside ArrayBuffer
• Adds Atomics object with atomic operations (add, sub, and, or, xor, exchange, compareExchange, load, store, isLockFree)
• Introduces nginx directive "js_shared_array_zone" for creating shared memory zones backed by SharedArrayBuffer

Reviewed changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/njs_value.h	Adds NJS_SHARED_ARRAY_BUFFER type and related macros
src/njs_vm.h	Adds NJS_OBJ_TYPE_SHARED_ARRAY_BUFFER and NJS_OBJECT_ATOMICS enum values
src/njs_vm.c	Implements njs_vm_set_sab_functions for custom SharedArrayBuffer allocators
src/njs_array_buffer.h	Updates njs_array_buffer_alloc signature to support shared buffers
src/njs_array_buffer.c	Implements SharedArrayBuffer constructor, prototype methods, and memory management
src/njs_atomics.c	New file implementing the Atomics object and atomic operations
src/njs_atomics.h	Header file for Atomics object
src/njs.h	Adds public API for SharedArrayBuffer (njs_vm_value_array_buffer_set2, njs_value_is_shared_array_buffer)
src/njs_vmcode.c	Updates typeof handler to include SharedArrayBuffer
src/njs_typed_array.c	Updates to pass shared flag to njs_array_buffer_alloc
src/njs_buffer.c	Updates buffer operations to handle SharedArrayBuffer
src/njs_builtin.c	Registers SharedArrayBuffer and Atomics in global scope
src/test/njs_unit_test.c	Adds comprehensive unit tests for SharedArrayBuffer and Atomics, including SAB memory management via mmap
src/test/njs_externals_test.c	Adds wrapSAB test helper for testing SharedArrayBuffer wrapping
nginx/ngx_js_shared_array.c	New file implementing nginx integration for shared arrays with read/write locks
nginx/ngx_js_shared_array.h	Header for nginx shared array integration
nginx/ngx_http_js_module.c	Adds js_shared_array_zone directive for HTTP module
nginx/ngx_stream_js_module.c	Adds js_shared_array_zone directive for stream module
nginx/ngx_js.c	Adds ngx.sharedArray global object
nginx/t/js_shared_array.t	Test suite for HTTP module SharedArrayBuffer support
nginx/t/stream_js_shared_array.t	Test suite for stream module SharedArrayBuffer support
nginx/config	Updates build configuration to include shared array files
auto/sources	Adds njs_atomics.c to build sources

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