X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;ds=inline;f=src%2Fsw_limits.c;h=bea14692749a679f6be57c0cf2451b769ac4a856;hb=18037e79f1dba7342dc28595d0ac3e5d5ad922ac;hp=eb1e5c39a00abca1010a0264346004291285c75b;hpb=aea4e458485559ffb7999ecbda0ed349c7d8edb7;p=libsigrok.git
diff --git a/src/sw_limits.c b/src/sw_limits.c
index eb1e5c39..bea14692 100644
--- a/src/sw_limits.c
+++ b/src/sw_limits.c
@@ -17,6 +17,12 @@
* along with this program. If not, see .
*/
+/**
+ * @file
+ * Software limits helper functions
+ * @internal
+ */
+
#include
#include
#include
@@ -25,12 +31,34 @@
#include
#include "libsigrok-internal.h"
+#define LOG_PREFIX "sw_limits"
+
+/**
+ * Initialize a software limit instance
+ *
+ * Must be called before any other operations are performed on a struct
+ * sr_sw_limits and should typically be called after the data structure has been
+ * allocated.
+ *
+ * @param limits the software limit instance to initialize
+ */
SR_PRIV void sr_sw_limits_init(struct sr_sw_limits *limits)
{
limits->limit_samples = 0;
limits->limit_msec = 0;
}
+/**
+ * Get software limit configuration
+ *
+ * Retrieve the currently configured software limit for the specified key.
+ * Should be called from the drivers config_get() callback.
+ *
+ * @param limits software limit instance
+ * @param key config item key
+ * @param data config item data
+ * @return SR_ERR_NA if @p key is not a supported limit, SR_OK otherwise
+ */
SR_PRIV int sr_sw_limits_config_get(struct sr_sw_limits *limits, uint32_t key,
GVariant **data)
{
@@ -48,6 +76,17 @@ SR_PRIV int sr_sw_limits_config_get(struct sr_sw_limits *limits, uint32_t key,
return SR_OK;
}
+/**
+ * Set software limit configuration
+ *
+ * Configure software limit for the specified key. Should be called from the
+ * drivers config_set() callback.
+ *
+ * @param limits software limit instance
+ * @param key config item key
+ * @param data config item data
+ * @return SR_ERR_NA if @p key is not a supported limit, SR_OK otherwise
+ */
SR_PRIV int sr_sw_limits_config_set(struct sr_sw_limits *limits, uint32_t key,
GVariant *data)
{
@@ -65,30 +104,65 @@ SR_PRIV int sr_sw_limits_config_set(struct sr_sw_limits *limits, uint32_t key,
return SR_OK;
}
+/**
+ * Start a new data acquisition session
+ *
+ * Resets the internal accounting for all software limits. Usually should be
+ * called from the drivers acquisition_start() callback.
+ *
+ * @param limits software limits instance
+ */
SR_PRIV void sr_sw_limits_acquisition_start(struct sr_sw_limits *limits)
{
limits->samples_read = 0;
limits->start_time = g_get_monotonic_time();
}
+/**
+ * Check if any of the configured software limits has been reached
+ *
+ * Usually should be called at the end of the drivers work function after all
+ * processing has been done.
+ *
+ * @param limits software limits instance
+ * @returns TRUE if any of the software limits has been reached and the driver
+ * should stop data acquisition, otherwise FALSE.
+ */
SR_PRIV gboolean sr_sw_limits_check(struct sr_sw_limits *limits)
{
if (limits->limit_samples) {
- if (limits->samples_read >= limits->limit_samples)
+ if (limits->samples_read >= limits->limit_samples) {
+ sr_dbg("Requested number of samples (%" PRIu64
+ ") reached.", limits->limit_samples);
return TRUE;
+ }
}
if (limits->limit_msec) {
guint64 now;
now = g_get_monotonic_time();
if (now > limits->start_time &&
- now - limits->start_time > limits->limit_msec)
+ now - limits->start_time > limits->limit_msec) {
+ sr_dbg("Requested sampling time (%" PRIu64
+ "ms) reached.", limits->limit_msec / 1000);
return TRUE;
+ }
}
return FALSE;
}
+/**
+ * Update the amount samples that have been read
+ *
+ * Update the amount of samples that have been read in the current data
+ * acquisition run. For each invocation @p samples_read will be accumulated and
+ * once the configured sample limit has been reached sr_sw_limits_check() will
+ * return TRUE.
+ *
+ * @param limits software limits instance
+ * @param samples_read the amount of samples that have been read
+ */
SR_PRIV void sr_sw_limits_update_samples_read(struct sr_sw_limits *limits,
uint64_t samples_read)
{