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/*
* libiio - Library for interfacing industrial I/O (IIO) devices
*
* Copyright (C) 2014 Analog Devices, Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* */
#ifndef __IIO_PRIVATE_H__
#define __IIO_PRIVATE_H__
/* Include public interface */
#include "iio.h"
#include "iio-config.h"
#include <stdbool.h>
#ifdef _MSC_BUILD
#define inline __inline
#define iio_snprintf sprintf_s
#else
#define iio_snprintf snprintf
#endif
#ifdef _WIN32
# ifdef LIBIIO_EXPORTS
# define __api __declspec(dllexport)
# else
# define __api __declspec(dllimport)
# endif
#elif __GNUC__ >= 4
# define __api __attribute__((visibility ("default")))
#else
# define __api
#endif
#ifdef WITH_MATLAB_BINDINGS_API
#include "bindings/matlab/iio-wrapper.h"
#endif
#define ARRAY_SIZE(x) (sizeof(x) ? sizeof(x) / sizeof((x)[0]) : 0)
#define BIT(x) (1 << (x))
#define BIT_MASK(bit) BIT((bit) % 32)
#define BIT_WORD(bit) ((bit) / 32)
#define TEST_BIT(addr, bit) (!!(*(((uint32_t *) addr) + BIT_WORD(bit)) \
& BIT_MASK(bit)))
#define SET_BIT(addr, bit) \
*(((uint32_t *) addr) + BIT_WORD(bit)) |= BIT_MASK(bit)
#define CLEAR_BIT(addr, bit) \
*(((uint32_t *) addr) + BIT_WORD(bit)) &= ~BIT_MASK(bit)
/* ntohl/htonl are a nightmare to use in cross-platform applications,
* since they are defined in different headers on different platforms.
* iio_be32toh/iio_htobe32 are just clones of ntohl/htonl. */
static inline uint32_t iio_be32toh(uint32_t word)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#ifdef __GNUC__
return __builtin_bswap32(word);
#else
return ((word & 0xff) << 24) | ((word & 0xff00) << 8) |
((word >> 8) & 0xff00) | ((word >> 24) & 0xff);
#endif
#else
return word;
#endif
}
static inline uint32_t iio_htobe32(uint32_t word)
{
return iio_be32toh(word);
}
/* Allocate zeroed out memory */
static inline void *zalloc(size_t size)
{
return calloc(1, size);
}
enum iio_attr_type {
IIO_ATTR_TYPE_DEVICE = 0,
IIO_ATTR_TYPE_DEBUG,
IIO_ATTR_TYPE_BUFFER,
};
struct iio_backend_ops {
struct iio_context * (*clone)(const struct iio_context *ctx);
ssize_t (*read)(const struct iio_device *dev, void *dst, size_t len,
uint32_t *mask, size_t words);
ssize_t (*write)(const struct iio_device *dev,
const void *src, size_t len);
int (*open)(const struct iio_device *dev,
size_t samples_count, bool cyclic);
int (*close)(const struct iio_device *dev);
int (*get_fd)(const struct iio_device *dev);
int (*set_blocking_mode)(const struct iio_device *dev, bool blocking);
void (*cancel)(const struct iio_device *dev);
int (*set_kernel_buffers_count)(const struct iio_device *dev,
unsigned int nb_blocks);
ssize_t (*get_buffer)(const struct iio_device *dev,
void **addr_ptr, size_t bytes_used,
uint32_t *mask, size_t words);
ssize_t (*read_device_attr)(const struct iio_device *dev,
const char *attr, char *dst, size_t len, enum iio_attr_type);
ssize_t (*write_device_attr)(const struct iio_device *dev,
const char *attr, const char *src,
size_t len, enum iio_attr_type);
ssize_t (*read_channel_attr)(const struct iio_channel *chn,
const char *attr, char *dst, size_t len);
ssize_t (*write_channel_attr)(const struct iio_channel *chn,
const char *attr, const char *src, size_t len);
int (*get_trigger)(const struct iio_device *dev,
const struct iio_device **trigger);
int (*set_trigger)(const struct iio_device *dev,
const struct iio_device *trigger);
void (*shutdown)(struct iio_context *ctx);
int (*get_version)(const struct iio_context *ctx, unsigned int *major,
unsigned int *minor, char git_tag[8]);
int (*set_timeout)(struct iio_context *ctx, unsigned int timeout);
};
/*
* If these structures are updated, the qsort functions defined in sort.c
* may need to be updated.
*/
struct iio_context_pdata;
struct iio_device_pdata;
struct iio_channel_pdata;
struct iio_scan_backend_context;
struct iio_channel_attr {
char *name;
char *filename;
};
struct iio_context {
struct iio_context_pdata *pdata;
const struct iio_backend_ops *ops;
const char *name;
char *description;
struct iio_device **devices;
unsigned int nb_devices;
char *xml;
char **attrs;
char **values;
unsigned int nb_attrs;
};
struct iio_channel {
struct iio_device *dev;
struct iio_channel_pdata *pdata;
void *userdata;
bool is_output;
bool is_scan_element;
struct iio_data_format format;
char *name, *id;
long index;
enum iio_modifier modifier;
enum iio_chan_type type;
struct iio_channel_attr *attrs;
unsigned int nb_attrs;
unsigned int number;
};
struct iio_device {
const struct iio_context *ctx;
struct iio_device_pdata *pdata;
void *userdata;
char *name, *id;
char **attrs;
unsigned int nb_attrs;
char **buffer_attrs;
unsigned int nb_buffer_attrs;
char **debug_attrs;
unsigned int nb_debug_attrs;
struct iio_channel **channels;
unsigned int nb_channels;
uint32_t *mask;
size_t words;
};
struct iio_buffer {
const struct iio_device *dev;
void *buffer, *userdata;
size_t length, data_length;
uint32_t *mask;
unsigned int dev_sample_size;
unsigned int sample_size;
bool is_output, dev_is_high_speed;
};
struct iio_context_info {
char *description;
char *uri;
};
struct iio_scan_result {
size_t size;
struct iio_context_info **info;
};
struct iio_context_info ** iio_scan_result_add(
struct iio_scan_result *scan_result, size_t num);
void free_channel(struct iio_channel *chn);
void free_device(struct iio_device *dev);
char *iio_channel_get_xml(const struct iio_channel *chn, size_t *len);
char *iio_device_get_xml(const struct iio_device *dev, size_t *len);
char *iio_context_create_xml(const struct iio_context *ctx);
int iio_context_init(struct iio_context *ctx);
bool iio_device_is_tx(const struct iio_device *dev);
int iio_device_open(const struct iio_device *dev,
size_t samples_count, bool cyclic);
int iio_device_close(const struct iio_device *dev);
int iio_device_set_blocking_mode(const struct iio_device *dev, bool blocking);
ssize_t iio_device_read_raw(const struct iio_device *dev,
void *dst, size_t len, uint32_t *mask, size_t words);
ssize_t iio_device_write_raw(const struct iio_device *dev,
const void *src, size_t len);
int iio_device_get_poll_fd(const struct iio_device *dev);
int read_double(const char *str, double *val);
int write_double(char *buf, size_t len, double val);
struct iio_context * local_create_context(void);
struct iio_context * network_create_context(const char *hostname);
struct iio_context * xml_create_context_mem(const char *xml, size_t len);
struct iio_context * xml_create_context(const char *xml_file);
struct iio_context * usb_create_context(unsigned int bus, unsigned int address,
unsigned int interface);
struct iio_context * usb_create_context_from_uri(const char *uri);
struct iio_context * serial_create_context_from_uri(const char *uri);
int local_context_scan(struct iio_scan_result *scan_result);
struct iio_scan_backend_context * usb_context_scan_init(void);
void usb_context_scan_free(struct iio_scan_backend_context *ctx);
int usb_context_scan(struct iio_scan_backend_context *ctx,
struct iio_scan_result *scan_result);
/* This function is not part of the API, but is used by the IIO daemon */
__api ssize_t iio_device_get_sample_size_mask(const struct iio_device *dev,
const uint32_t *mask, size_t words);
void iio_channel_init_finalize(struct iio_channel *chn);
unsigned int find_channel_modifier(const char *s, size_t *len_p);
char *iio_strdup(const char *str);
int iio_context_add_attr(struct iio_context *ctx,
const char *key, const char *value);
#undef __api
#endif /* __IIO_PRIVATE_H__ */
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