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HevTaskSystem

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HevTaskSystem is a simple, lightweight multi-task system (coroutines) for Unix.

The task system is executed by a Unix process/thread. In task system, you can creates many tasks and attachs to task system. When a task yield or blocked by I/O, the scheduler will pick a suitable task from running list and switch to. The memory space, file descriptors and other resources are shared for all tasks in task system. Every task has a private, standalone task structure (#HevTask) and stack in heap of the process.

In task, you can allocate memory from heap, read and write data from to stack, and do I/O operations in synchronized mode.

Features

  • Simple/lightweight task.
  • I/O operations wrapper.
  • Inter-task synchronous. (Mutex/Condition)
  • Inter-task communications. (Channel)
  • Slice-based memory allocator.
  • Call on new stack.
  • Multi-thread support.
  • Multi-platform support. (Linux/BSD/macOS)

How to Build

Unix:

git clone https://gitlab.com/hev/hev-task-system
cd hev-task-system
make

# Link with librt (only for glibc versions before 2.17)
make LDFLAGS=-lrt

# Disable multi-thread support
make ENABLE_PTHREAD=0

# Disable stack overflow detection
make ENABLE_STACK_OVERFLOW_DETECTION=0

# Set stack backend to heap (Recommended for 32-bit)
make CONFIG_STACK_BACKEND=STACK_HEAP

# Disable sliced memory allocator
make ENABLE_MEMALLOC_SLICE=0

# Disable I/O splice by splice syscall (for old Linux kernel)
make ENABLE_IO_SPLICE_SYSCALL=0

# Demos
make apps

# Tests
make tests

Android:

mkdir hev-task-system
cd hev-task-system
git clone https://gitlab.com/hev/hev-task-system jni
ndk-build

Demos

  1. simple
  2. channel
  3. timeout
  4. wakeup
  5. echo-server
  6. call
  7. gtk
  8. curl

Authors

License

LGPL