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Message-Id: <1301583255-28468-18-git-send-email-jic23@cam.ac.uk>
Date: Thu, 31 Mar 2011 15:54:11 +0100
From: Jonathan Cameron <jic23@....ac.uk>
To: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: arnd@...db.de, tglx@...utronix.de,
Jonathan Cameron <jic23@....ac.uk>
Subject: [PATCH 17/21] staging:iio:Documentation generic_buffer.c update to new abi for buffers.
Trivial space before newline fix incorporated.
Signed-off-by: Jonathan Cameron <jic23@....ac.uk>
---
drivers/staging/iio/Documentation/generic_buffer.c | 53 +++++--------------
1 files changed, 14 insertions(+), 39 deletions(-)
diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c
index eb72e95..3c41d7d 100644
--- a/drivers/staging/iio/Documentation/generic_buffer.c
+++ b/drivers/staging/iio/Documentation/generic_buffer.c
@@ -27,6 +27,7 @@
#include <sys/dir.h>
#include <linux/types.h>
#include <string.h>
+#include <poll.h>
#include "iio_utils.h"
/**
@@ -135,7 +136,7 @@ int main(int argc, char **argv)
ssize_t read_size;
struct iio_event_data dat;
int dev_num, trig_num;
- char *buffer_access, *buffer_event;
+ char *buffer_access;
int scan_size;
int noevents = 0;
char *dummy;
@@ -210,7 +211,7 @@ int main(int argc, char **argv)
*/
ret = build_channel_array(dev_dir_name, &infoarray, &num_channels);
if (ret) {
- printf("Problem reading scan element information \n");
+ printf("Problem reading scan element information\n");
goto error_free_triggername;
}
@@ -251,54 +252,32 @@ int main(int argc, char **argv)
}
ret = asprintf(&buffer_access,
- "/dev/device%d:buffer0:access0",
+ "/dev/device%d:buffer0",
dev_num);
if (ret < 0) {
ret = -ENOMEM;
goto error_free_data;
}
- ret = asprintf(&buffer_event, "/dev/device%d:buffer0:event0", dev_num);
- if (ret < 0) {
- ret = -ENOMEM;
- goto error_free_buffer_access;
- }
/* Attempt to open non blocking the access dev */
fp = open(buffer_access, O_RDONLY | O_NONBLOCK);
if (fp == -1) { /*If it isn't there make the node */
printf("Failed to open %s\n", buffer_access);
ret = -errno;
- goto error_free_buffer_event;
- }
- /* Attempt to open the event access dev (blocking this time) */
- fp_ev = fopen(buffer_event, "rb");
- if (fp_ev == NULL) {
- printf("Failed to open %s\n", buffer_event);
- ret = -errno;
- goto error_close_buffer_access;
+ goto error_free_buffer_access;
}
/* Wait for events 10 times */
for (j = 0; j < num_loops; j++) {
if (!noevents) {
- read_size = fread(&dat,
- 1,
- sizeof(struct iio_event_data),
- fp_ev);
- switch (dat.id) {
- case IIO_EVENT_CODE_RING_100_FULL:
- toread = buf_len;
- break;
- case IIO_EVENT_CODE_RING_75_FULL:
- toread = buf_len*3/4;
- break;
- case IIO_EVENT_CODE_RING_50_FULL:
- toread = buf_len/2;
- break;
- default:
- printf("Unexpecteded event code\n");
- continue;
- }
+ struct pollfd pfd = {
+ .fd = fp,
+ .events = POLLIN,
+ };
+
+ poll(&pfd, 1, -1);
+ toread = buf_len;
+
} else {
usleep(timedelay);
toread = 64;
@@ -320,22 +299,18 @@ int main(int argc, char **argv)
/* Stop the ring buffer */
ret = write_sysfs_int("enable", buf_dir_name, 0);
if (ret < 0)
- goto error_close_buffer_event;
+ goto error_close_buffer_access;
/* Disconnect from the trigger - just write a dummy name.*/
write_sysfs_string("trigger/current_trigger",
dev_dir_name, "NULL");
-error_close_buffer_event:
- fclose(fp_ev);
error_close_buffer_access:
close(fp);
error_free_data:
free(data);
error_free_buffer_access:
free(buffer_access);
-error_free_buffer_event:
- free(buffer_event);
error_free_buf_dir_name:
free(buf_dir_name);
error_free_triggername:
--
1.7.3.4
--
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