ucx: docs/src/features.md@c33e0ac069dd (annotated)

docs/src/features.md@c33e0ac069dd (annotated)

docs/src/features.md

Tue, 27 Jun 2023 18:24:28 +0200

author: Mike Becker <universe@uap-core.de>
date: Tue, 27 Jun 2023 18:24:28 +0200
changeset 723: c33e0ac069dd
parent 722: adc3c48dd3af
child 724: 5e7b1951dc80
permissions: -rw-r--r--

add web documentation for strings

 ---
 title: UCX Features
 ---
 <div id="modules">
 ------------------------ -------------------------  -------------------  ---------------------------------
 [Allocator](#allocator)  [String](#string)          [Buffer](#buffer)    [Memory&nbsp;Pool](#memory-pool)
 [Iterator](#iterator)    [Collection](#collection)  [List](#list)        [Map](#map)
 [Utilities](#utilities)
 ------------------------ -------------------------  -------------------  ---------------------------------
 </div>
 ## Allocator
 *Header file:* [allocator.h](api/allocator_8h.html)
 The UCX allocator provides an interface for implementing an own memory allocation mechanism.
 Various function in UCX provide an additional alternative signature that takes an allocator as
 argument. A default allocator implementation using the stdlib memory management functions is
 available via the global symbol `cxDefaultAllocator`.
 If you want to define your own allocator, you need to initialize the `CxAllocator` structure
 with a pointer to an allocator class (containing function pointers for the memory management
 functions) and an optional pointer to an arbitrary memory region that can be used to store
 state information for the allocator. An example is shown below:
 ```c
 struct my_allocator_state {
     size_t total;
     size_t avail;
     char[] mem;
 };
 static cx_allocator_class my_allocator_class = {
         my_malloc_impl,
         my_realloc_impl,   // all these functions are somewhere defined
         my_calloc_impl,
         my_free_impl
 };
 CxAllocator create_my_allocator(size_t n) {
     CxAllocator alloc;
     alloc.cl = &my_allocator_class;
     alloc.data = calloc(1, sizeof(struct my_allocator_state) + n);
     return alloc;
 }
 void free_my_allocator(CxAllocator *alloc) {
     free(alloc.data);
     free(alloc);
 }
 ```
 ## String
 *Header file:* [string.h](api/string_8h.html)
 UCX strings come in two variants: immutable (`cxstring`) and mutable (`cxmutstr`).
 The functions of UCX are designed to work with immutable strings by default but in situations where it is necessary,
 the API also provides alternative functions that work directly with mutable strings.
 Functions that change a string in-place are, of course, only accepting mutable strings.
 When you are using UCX functions, or defining your own functions, you are sometimes facing the "problem",
 that the function only accepts arguments of type `cxstring` but you only have a `cxmutstr` at hand.
 In this case you _should not_ introduce a wrapper function that accepts the `cxmutstr`,
 but instead you should use the `cx_strcast()` function to cast the argument to the correct type.
 In general, UCX strings are **not** necessarily zero-terminated. If a function guarantees to return zero-terminated
 string, it is explicitly mentioned in the documentation of the respective function.
 As a rule of thumb, you _should not_ pass the strings of a UCX string structure to another API without explicitly
 ensuring that the string is zero-terminated.
 ## Buffer
 *Header file:* [buffer.h](api/buffer_8h.html)
 ## Memory Pool
 *Header file:* [mempool.h](api/mempool_8h.html)
 ### Basic Memory Pool
 *Header file:* [basic_mempool.h](api/basic__mempool_8h.html)
 ## Iterator
 *Header file:* [iterator.h](api/iterator_8h.html)
 ## Collection
 *Header file:* [collection.h](api/collection_8h.html)
 ## List
 *Header file:* [list.h](api/list_8h.html)
 ### Linked List
 *Header file:* [linked_list.h](api/linked__list_8h.html)
 ### Array List
 *Header file:* [array_list.h](api/array__list_8h.html)
 ## Map
 *Header file:* [map.h](api/map_8h.html)
 ### Hash Map
 *Header file:* [hash_map.h](api/hash__map_8h.html)
 ## Utilities
 *Header file:* [utils.h](api/utils_8h.html)
 ### Printf Functions
 *Header file:* [printf.h](api/printf_8h.html)
 ### Compare Functions
 *Header file:* [compare.h](api/compare_8h.html)

Mercurial > hg > ucx / annotate

docs/src/features.md@c33e0ac069dd (annotated)

docs/src/features.md