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cpu/native: async_read: add native_async_read_add_int_handler()

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fcntl(fd, F_SETOWN, getpid()); doesn't seem to work on Linux
to get generate a signal when an event on the GPIO fd occurs.

So fall back to the same method as on OS X and call poll() in
a child process.
This commit is contained in:
Koen Zandberg 2017-08-20 14:43:58 +02:00 committed by Benjamin Valentin
parent a274ea45fc
commit 47e2885f80
2 changed files with 21 additions and 4 deletions
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15
cpu/native/async_read.c
View File

@ -31,9 +31,7 @@ static int _next_index;
static struct pollfd _fds[ASYNC_READ_NUMOF];
static async_read_t pollers[ASYNC_READ_NUMOF];
#ifdef __MACH__
static void _sigio_child(int fd);
#endif
static void _async_io_isr(void) {
if (real_poll(_fds, _next_index, 0) > 0) {
@ -104,7 +102,17 @@ void native_async_read_add_handler(int fd, void *arg, native_async_read_callback
_next_index++;
}
#ifdef __MACH__
void native_async_read_add_int_handler(int fd, void *arg, native_async_read_callback_t handler) {
if (_next_index >= ASYNC_READ_NUMOF) {
err(EXIT_FAILURE, "native_async_read_add_int_handler(): too many callbacks");
}
_add_handler(fd, arg, handler);
_sigio_child(_next_index);
_next_index++;
}
static void _sigio_child(int index)
{
struct pollfd fds = _fds[index];
@ -148,5 +156,4 @@ static void _sigio_child(int index)
sigwait(&sigmask, &sig);
}
}
#endif
/** @} */

10
cpu/native/include/async_read.h
View File

@ -80,6 +80,16 @@ void native_async_read_continue(int fd);
*/
void native_async_read_add_handler(int fd, void *arg, native_async_read_callback_t handler);
/**
* @brief start monitoring of file descriptor as interrupt
*
* @param[in] fd The file descriptor to monitor
* @param[in] arg Pointer to be passed as arguments to the callback
* @param[in] handler The callback function to be called when the file
* descriptor is ready to read.
*/
void native_async_read_add_int_handler(int fd, void *arg, native_async_read_callback_t handler);
#ifdef __cplusplus
}
#endif