[libc][docs] add c11 threads and uchar (llvm#119250)

FWICT, these were the newly added headers for c11.

libc/docs/headers/index.rst

@@ -19,3 +19,4 @@ Implementation Status
    strings
    threads
    time
+   uchar

libc/docs/headers/threads.rst

@@ -18,11 +18,15 @@ Macros
     - POSIX.1-2024 Standard Section
   * - ONCE_FLAG_INIT
     -
-    - 7.28.1.3
+    - 7.28.1
     -
   * - TSS_DTOR_ITERATIONS
     -
-    - 7.28.1.3
+    - 7.28.1
+    -
+  * - __STDC_NO_THREADS__
+    -
+    - 7.28.1
     -
 
 Functions
@@ -67,27 +71,27 @@ Functions
     -
   * - mtx_destroy
     - |check|
-    - 7.28.4.1
+    - 7.28.4.2
     -
   * - mtx_init
     - |check|
-    - 7.28.4.2
+    - 7.28.4.3
     -
   * - mtx_lock
     - |check|
-    - 7.28.4.3
+    - 7.28.4.4
     -
   * - mtx_timedlock
     -
-    - 7.28.4.4
+    - 7.28.4.5
     -
   * - mtx_trylock
     -
-    - 7.28.4.5
+    - 7.28.4.6
     -
   * - mtx_unlock
     - |check|
-    - 7.28.4.6
+    - 7.28.4.7
     -
   * - thrd_create
     - |check|

libc/docs/headers/uchar.rst

@@ -0,0 +1,59 @@
+.. include:: ../check.rst
+
+=======
+uchar.h
+=======
+
+Macros
+======
+
+.. list-table::
+  :widths: auto
+  :align: center
+  :header-rows: 1
+
+  * - Macro
+    - Implemented
+    - C23 Standard Section
+    - POSIX.1-2024 Standard Section
+  * - __STDC_VERSION_UCHAR_H__
+    -
+    - 7.30.1
+    -
+
+Functions
+=========
+
+.. list-table::
+  :widths: auto
+  :align: center
+  :header-rows: 1
+
+  * - Function
+    - Implemented
+    - C23 Standard Section
+    - POSIX.1-2024 Standard Section
+  * - c16rtomb
+    -
+    - 7.30.2.5
+    -
+  * - c32rtomb
+    -
+    - 7.30.2.7
+    -
+  * - c8rtomb
+    -
+    - 7.30.2.3
+    -
+  * - mbrtoc16
+    -
+    - 7.30.2.4
+    -
+  * - mbrtoc32
+    -
+    - 7.30.2.6
+    -
+  * - mbrtoc8
+    -
+    - 7.30.2.2
+    -

libc/utils/docgen/threads.json

@@ -1,10 +1,13 @@
 {
   "macros": {
+    "__STDC_NO_THREADS__": {
+      "c-definition": "7.28.1"
+    },
     "ONCE_FLAG_INIT": {
-      "c-definition": "7.28.1.3"
+      "c-definition": "7.28.1"
     },
     "TSS_DTOR_ITERATIONS": {
-      "c-definition": "7.28.1.3"
+      "c-definition": "7.28.1"
     }
   },
   "functions": {
@@ -30,22 +33,22 @@
       "c-definition": "7.28.3.6"
     },
     "mtx_destroy": {
-      "c-definition": "7.28.4.1"
+      "c-definition": "7.28.4.2"
     },
     "mtx_init": {
-      "c-definition": "7.28.4.2"
+      "c-definition": "7.28.4.3"
     },
     "mtx_lock": {
-      "c-definition": "7.28.4.3"
+      "c-definition": "7.28.4.4"
     },
     "mtx_timedlock": {
-      "c-definition": "7.28.4.4"
+      "c-definition": "7.28.4.5"
     },
     "mtx_trylock": {
-      "c-definition": "7.28.4.5"
+      "c-definition": "7.28.4.6"
     },
     "mtx_unlock": {
-      "c-definition": "7.28.4.6"
+      "c-definition": "7.28.4.7"
     },
     "thrd_create": {
       "c-definition": "7.28.5.1"

libc/utils/docgen/uchar.json

@@ -0,0 +1,27 @@
+{
+  "macros": {
+    "__STDC_VERSION_UCHAR_H__": {
+      "c-definition": "7.30.1"
+    }
+  },
+  "functions": {
+    "mbrtoc8": {
+      "c-definition": "7.30.2.2"
+    },
+    "c8rtomb": {
+      "c-definition": "7.30.2.3"
+    },
+    "mbrtoc16": {
+      "c-definition": "7.30.2.4"
+    },
+    "c16rtomb": {
+      "c-definition": "7.30.2.5"
+    },
+    "mbrtoc32": {
+      "c-definition": "7.30.2.6"
+    },
+    "c32rtomb": {
+      "c-definition": "7.30.2.7"
+    }
+  }
+}