Libc

Mon, 01 Jan 0001 00:00:00 +0000

`XWOS/xwos` Kernel Dependencies on libc

string.h: depends on memset(), memcpy();
stdlib.h
- When XWOSCFG_SKD_THD_STDC_MM, XWOSCFG_SKD_SWT_STDC_MM, XWOSCFG_SYNC_SEM_STDC_MM, XWOSCFG_SYNC_COND_STDC_MM, XWOSCFG_SYNC_EVT_STDC_MM or XWOSCFG_LOCK_MTX_STDC_MM is configured, depends on malloc() and free() for dynamic object creation and deletion;
inttypes.h, stdint.h, stddef.h: XWOS base types are defined based on standard C base types;
stdbool.h: depends on the bool type definition;
stdatomic.h: depends on atomic operation memory barrier definitions;
stdarg.h
- If XWLIBCFG_SC is configured as 1, xwos/lib/sc.h requires variadic functions;
- If XWLIBCFG_LOG is configured as 1, xwos/lib/xwlog.c requires variadic functions;
stdio.h: If XWLIBCFG_LOG is configured as 1, formatted logging in xwos/lib/xwlog.c depends on vsnprintf().

libc Support Provided by `XWOS/xwmd`

Dynamic Memory Management

stdlib.h
- malloc()
- free()
- cfree()
- realloc()
- calloc()
- memalign()
- aligned_alloc()
- valloc()
- pvalloc()

Depending on the libc selected in the configuration:

C++

Mon, 01 Jan 0001 00:00:00 +0000

The XWOS kernel is developed in pure C and does not depend on the C++ standard library. Users can use C++ language and the C++ standard library in threads. The C++ standard library is provided by the compiler. The following is a partial feature list:

g++, libstdc++, libsupc++
- new, delete, new[], delete[], placement new, aligned new (C++17)
- Containers
  - array
  - vector
  - deque
  - map, multimap, unordered_map, unordered_multimap
  - set, multiset, unordered_set, unordered_multiset
  - list, forward_list
  - stack, queue, priority_queue
- I/O stream
- string
- atomic
- RTTI
- exception
- unwind
- chrono
- thread
- mutex
- condition_variable
llvm(clang++), libc++, libc++abi
- new, delete, new[], delete[], placement new, aligned new (C++17)
- Containers
  - array
  - vector
  - deque
  - map, multimap, unordered_map, unordered_multimap
  - set, multiset, unordered_set, unordered_multiset
  - list, forward_list
  - stack, queue, priority_queue
- I/O stream
- string
- atomic
- RTTI
- exception
- unwind
- chrono
- thread
- mutex
- condition_variable

C/C++ on XWOS

Libc

XWOS/xwos Kernel Dependencies on libc

libc Support Provided by XWOS/xwmd

Dynamic Memory Management

C++

`XWOS/xwos` Kernel Dependencies on libc

libc Support Provided by `XWOS/xwmd`