pa_ringbuffer.odin

package pa_ringbuffer


// Building:
//    clang pa_ringbuffer.c pa_ringbuffer.h -c -O2 -Os -fPIC
//    ar rcs pa_ringbuffer.a pa_ringbuffer.o
foreign import pa_ringbuffer "pa_ringbuffer.a"

rb_size_t :: i32

RingBuffer :: struct {
    bufferSize: rb_size_t,
    writeIndex: rb_size_t,
    readIndex: rb_size_t,
    bigMask: rb_size_t,
    smallMask: rb_size_t,
    elementSizeBytes: rb_size_t,
    buffer: ^u8,
}

@(default_calling_convention="c", link_prefix="PaUtil_")
foreign pa_ringbuffer {

    InitializeRingBuffer :: proc (
        rbuf: ^RingBuffer,
        elementSizeBytes: rb_size_t,
        elementCount: rb_size_t,
        dataPtr: rawptr
    ) -> rb_size_t ---
    FlushRingBuffer :: proc (rbuf: ^RingBuffer) ---
    GetRingBufferWriteAvailable :: proc (rbuf: ^RingBuffer) -> rb_size_t ---
    GetRingBufferReadAvailable :: proc (rbuf: ^RingBuffer) -> rb_size_t ---

    WriteRingBuffer :: proc (rbuf: ^RingBuffer, data: rawptr, elementCount: rb_size_t) -> rb_size_t ---
    ReadRingBuffer :: proc (rbuf: ^RingBuffer, data: rawptr, elementCount: rb_size_t) -> rb_size_t ---

    GetRingBufferWriteRegions :: proc (rbuf: ^RingBuffer, elementCount: rb_size_t,
        dataPtr1: ^rawptr, sizePtr1: ^rb_size_t,
        dataPtr2: ^rawptr, sizePtr2: ^rb_size_t,
    ) -> rb_size_t ---
    AdvanceRingBufferWriteIndex :: proc (rbuf: ^RingBuffer, elementCount: rb_size_t) -> rb_size_t ---

    GetRingBufferReadRegions :: proc (rbuf: ^RingBuffer, elementCount: rb_size_t,
        dataPtr1: ^rawptr, sizePtr1: ^rb_size_t,
        dataPtr2: ^rawptr, sizePtr2: ^rb_size_t,
    ) -> rb_size_t ---
    AdvanceRingBufferReadIndex :: proc (rbuf: ^RingBuffer, elementCount: rb_size_t) -> rb_size_t ---

}