diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/socket/libraries/fifo/nrf_fifo.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/socket/libraries/fifo/nrf_fifo.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/socket/libraries/fifo/nrf_fifo.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/socket/libraries/fifo/nrf_fifo.c new file mode 100644 index 0000000..1458b01 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/socket/libraries/fifo/nrf_fifo.c @@ -0,0 +1,176 @@ +/** + * Copyright (c) 2015 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "iot_defines.h" +#include "iot_errors.h" +#include "nrf_fifo.h" +#include "mem_manager.h" +#include "nrf.h" + +static __INLINE uint32_t fifo_inc(nrf_fifo_t * p_fifo, uint32_t pos) +{ + return (pos + 1) % p_fifo->nmemb; +} + +static __INLINE bool fifo_full(nrf_fifo_t * p_fifo) +{ + return fifo_inc(p_fifo, p_fifo->write_pos) == p_fifo->read_pos; +} + +static __INLINE bool fifo_empty(nrf_fifo_t * p_fifo) +{ + return p_fifo->read_pos == p_fifo->write_pos; +} + +static __INLINE void fifo_enq(nrf_fifo_t * p_fifo, void * p_ctx) +{ + p_fifo->pp_elements[p_fifo->write_pos] = p_ctx; + __DSB(); + p_fifo->write_pos = fifo_inc(p_fifo, p_fifo->write_pos); +} + + +static __INLINE void fifo_deq(nrf_fifo_t * p_fifo, void ** pp_ctx) +{ + *pp_ctx = p_fifo->pp_elements[p_fifo->read_pos]; + __DSB(); + p_fifo->read_pos = fifo_inc(p_fifo, p_fifo->read_pos); +} + +uint32_t nrf_fifo_init(nrf_fifo_t * p_fifo, uint32_t nmemb, fifo_wait_fn wait_fn, fifo_flush_fn flush_fn) +{ + uint32_t err_code = NRF_SUCCESS; + uint32_t nmemb_actual = nmemb + 1; // Required to allow detection of empty and full state + p_fifo->pp_elements = nrf_malloc(nmemb_actual * sizeof(void *)); + + if (p_fifo->pp_elements == NULL) + { + err_code = NRF_ERROR_NO_MEM; + } + else + { + p_fifo->nmemb = nmemb_actual; + p_fifo->wait = wait_fn; + p_fifo->flush = flush_fn; + p_fifo->read_pos = 0; + p_fifo->write_pos = 0; + } + return err_code; +} + +void nrf_fifo_deinit(nrf_fifo_t * p_fifo) +{ + if (p_fifo->flush != NULL) + { + void * p_data; + uint32_t err_code = nrf_fifo_deq(p_fifo, &p_data, false); + while (err_code == NRF_SUCCESS) + { + p_fifo->flush(p_data); + err_code = nrf_fifo_deq(p_fifo, &p_data, false); + } + } + nrf_free(p_fifo->pp_elements); + p_fifo->nmemb = 0; + p_fifo->read_pos = 0; + p_fifo->write_pos = 0; + p_fifo->wait = NULL; + p_fifo->flush = NULL; +} + +uint32_t nrf_fifo_enq(nrf_fifo_t * p_fifo, void * p_ctx, bool wait) +{ + uint32_t err_code = NRF_SUCCESS; + + if (fifo_full(p_fifo) == true) + { + if (wait == false || p_fifo->wait == NULL) + { + err_code = SOCKET_WOULD_BLOCK; + } + else + { + while (fifo_full(p_fifo) == true && err_code == NRF_SUCCESS) + { + err_code = p_fifo->wait(); + } + } + } + else + { + fifo_enq(p_fifo, p_ctx); + } + return err_code; +} + +uint32_t nrf_fifo_deq(nrf_fifo_t * p_fifo, void ** pp_ctx, bool wait) +{ + uint32_t err_code = NRF_SUCCESS; + + if (fifo_empty(p_fifo) == true) + { + if (wait == false || p_fifo->wait == NULL) + { + err_code = SOCKET_WOULD_BLOCK; + } + else + { + while (fifo_empty(p_fifo) == true && err_code == NRF_SUCCESS) + { + err_code = p_fifo->wait(); + } + } + } + + if (err_code == NRF_SUCCESS) + { + fifo_deq(p_fifo, pp_ctx); + } + return err_code; +} + +bool nrf_fifo_empty(nrf_fifo_t * p_fifo) +{ + return fifo_empty(p_fifo); +} + +bool nrf_fifo_full(nrf_fifo_t * p_fifo) +{ + return fifo_full(p_fifo); +} |