163 lines
6.1 KiB
Markdown
163 lines
6.1 KiB
Markdown
# Tanya
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[](https://travis-ci.org/caraus-ecms/tanya)
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[](https://ci.appveyor.com/project/belka-ew/tanya/branch/master)
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[](https://codecov.io/gh/caraus-ecms/tanya)
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[](https://code.dlang.org/packages/tanya)
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[](https://code.dlang.org/packages/tanya)
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[](https://raw.githubusercontent.com/caraus-ecms/tanya/master/LICENSE)
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Tanya is a general purpose library for D programming language.
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Its aim is to simplify the manual memory management in D and to provide a
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guarantee with @nogc attribute that there are no hidden allocations on the
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Garbage Collector heap. Everything in the library is usable in @nogc code.
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Tanya extends Phobos functionality and provides alternative implementations for
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data structures and utilities that depend on the Garbage Collector in Phobos.
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* [Bug tracker](https://issues.caraus.io/projects/tanya/issues)
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* [Documentation](https://docs.caraus.io/tanya)
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* [Contribution guidelines](CONTRIBUTING.md)
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## Overview
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Tanya consists of the following packages:
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* `async`: Event loop (epoll, kqueue and IOCP).
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* `container`: Queue, Array, Singly and doubly linked lists, Buffers, UTF-8
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string, Hash set.
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* `format`: Formatting and conversion functions.
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* `math`: Arbitrary precision integer and a set of functions.
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* `memory`: Tools for manual memory management (allocators, smart pointers).
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* `net`: URL-Parsing, sockets, utilities.
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* `os`: Platform-independent interfaces to operating system functionality.
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## Basic usage
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### Allocators
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Memory management is done with allocators. Instead of using `new` to create an
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instance of a class, an allocator is used:
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```d
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import tanya.memory;
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class A
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{
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this(int arg)
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{
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}
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}
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A a = defaultAllocator.make!A(5);
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defaultAllocator.dispose(a);
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```
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As you can see, the user is responsible for deallocation, therefore `dispose`
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is called at the end.
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If you want to change the `defaultAllocator` to something different, you
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probably want to do it at the program's beginning. Or you can invoke another
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allocator directly. It is important to ensure that the object is destroyed
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using the same allocator that was used to allocate it.
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What if I get an allocated object from some function? The generic rule is: If
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you haven't requested the memory yourself (with `make`), you don't need to free
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it.
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`tanya.memory.smartref` contains smart pointers, helpers that can take care of
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a proper deallocation in some cases for you.
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### Exceptions
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Since exceptions are normal classes in D, they are allocated and dellocated the
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same as described above, but:
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1. The caller is **always** responsible for destroying a caught exception.
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2. Exceptions are **always** allocated and should be always allocated with the
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`defaultAllocator`.
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```d
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import tanya.memory;
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void functionThatThrows()
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{
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throw defaultAlocator.make!Exception("An error occurred");
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}
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try
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{
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functionThatThrows()
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}
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catch (Exception e)
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{
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defaultAllocator.dispose(e);
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}
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```
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### Containers
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Arrays are commonly used in programming. D's built-in arrays often rely on the
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GC. It is inconvenient to change their size, reserve memory for future use and
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so on. Containers can help here. The following example demonstrates how
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`tanya.container.array.Array` can be used instead of `int[]`.
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```d
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import tanya.container.array;
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Array!int arr;
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// Reserve memory if I know that my container will contain approximately 15
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// elements.
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arr.reserve(15);
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arr.insertBack(5); // Add one element.
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arr.length = 10; // New elements are initialized to 0.
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// Iterate over the first five elements.
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foreach (el; arr[0 .. 5])
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{
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}
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int i = arr[7]; // Access 7th element.
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```
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There are more containers in the `tanya.container` package.
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## Development
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### Supported compilers
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| dmd |
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|:-------:|
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| 2.074.1 |
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| 2.073.2 |
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| 2.072.2 |
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| 2.071.2 |
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### Current status
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Following modules are under development:
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| Feature | Branch | Build status |
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|----------|:---------:|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| BitArray | bitvector | [](https://travis-ci.org/caraus-ecms/tanya) [](https://ci.appveyor.com/project/belka-ew/tanya/branch/bitvector) |
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| TLS | crypto | [](https://travis-ci.org/caraus-ecms/tanya) [](https://ci.appveyor.com/project/belka-ew/tanya/branch/crypto) |
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| File IO | io | [](https://travis-ci.org/caraus-ecms/tanya) [](https://ci.appveyor.com/project/belka-ew/tanya/branch/io) |
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### Release management
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3-week release cycle.
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Deprecated features are removed after one release (in approximately 6 weeks after deprecating).
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## Further characteristics
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* Tanya is a native D library without any external dependencies.
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* Tanya is cross-platform. The development happens on a 64-bit Linux, but it
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is being tested on Windows and FreeBSD as well.
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* The library isn't thread-safe yet.
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