mulle-multififo

🐛 mulle-multififo multi-producer/multi-consumer FIFO holding void *

Written for multi-thread configurations. You can have multiple producers and consumers operating on the FIFO. The size of the FIFO is set at runtime. Use mulle-fifo if your require only a dual-thread solution.

There is a locking and a non-locking variant.

Release Version	Release Notes
	RELEASENOTES

API

void   _mulle_pointermultififo_init( struct mulle_pointermultififo *p,
                                     unsigned int size,
                                     struct mulle_allocator *allocator)

Call ..._init to initalize the FIFO for use. Specify a size for the FIFO. A FIFO must be at least two entries sized. Tip: Make the FIFO at least as big as the expected number of threads competing for access.

void   _mulle_pointermultififo_done( struct mulle_pointermultififo *p)

Call ..._done to free the FIFO when no other thread needs it. This is necessary to avoid leaks.

void   *_mulle_pointermultififo_read_barrier( struct mulle_pointermultififo *p)

Read from the FIFO. Will return NULL if empty, so will not block. Will put up a memory barrier to ensure that the memory pointed to by the returned pointer is valid.

int   _mulle_pointermultififo_write( struct mulle_pointermultififo *p,
                                     void *pointer)

Write to the FIFO. Will return -1 if full, 0 on success, so will not block.

Usage

You can not store NULL pointers or ~0 pointers into the FIFO.

If the FIFO is full your write will return with an error. If the FIFO is empty on read you will get a NULL pointer.

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Add

This project is a component of the mulle-core library. As such you usually will not add or install it individually, unless you specifically do not want to link against mulle-core.

Add as an individual component

Use mulle-sde to add mulle-multififo to your project:

mulle-sde add github:mulle-concurrent/mulle-multififo

To only add the sources of mulle-multififo with dependency sources use clib:

clib install --out src/mulle-concurrent mulle-concurrent/mulle-multififo

Add -isystem src/mulle-concurrent to your CFLAGS and compile all the sources that were downloaded with your project.

Install

Install with mulle-sde

Use mulle-sde to build and install mulle-multififo and all dependencies:

mulle-sde install --prefix /usr/local \
   https://github.com/mulle-concurrent/mulle-multififo/archive/latest.tar.gz

Manual Installation

Install the requirements:

Requirements	Description
mulle-thread	🔠 Cross-platform thread/mutex/tss/atomic operations in C
mulle-allocator	🔄 Flexible C memory allocation scheme

Download the latest tar or zip archive and unpack it.

Install mulle-multififo into /usr/local with cmake:

cmake -B build \
      -DCMAKE_INSTALL_PREFIX=/usr/local \
      -DCMAKE_PREFIX_PATH=/usr/local \
      -DCMAKE_BUILD_TYPE=Release &&
cmake --build build --config Release &&
cmake --install build --config Release

Author

Nat! for Mulle kybernetiK