SoW-2020-0003: Trace Hit Counters

[lttng-tools.git] / src / common / utils.c

diff --git a/src/common/utils.c b/src/common/utils.c
index bd61fff3d52ad8c6c16d68b0ca9e195009225018..df409aa4cc6ddde35c81cda88f7b4ef7f6330894 100644 (file)
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -1486,6 +1486,16 @@ fopen_error:
        return ret;
 }
 
+LTTNG_HIDDEN
+int utils_get_number_of_possible_cpus(void)
+{
+       /*
+        * Return the number of configured cpus as opposed to number of online
+        * cpus.
+        */
+       return sysconf(_SC_NPROCESSORS_CONF);
+}
+
 /*
  * Returns an estimate of the number of bytes of memory available based on the
  * the information in `/proc/meminfo`. The number returned by this function is
@@ -1669,3 +1679,39 @@ end:
        free(buf);
        return ret_val;
 }
+
+LTTNG_HIDDEN
+int utils_parse_unsigned_long_long(const char *str,
+               unsigned long long *value)
+{
+       int ret;
+       char *endptr;
+
+       assert(str);
+       assert(value);
+
+       errno = 0;
+       *value = strtoull(str, &endptr, 10);
+
+       /* Conversion failed. Out of range? */
+       if (errno != 0) {
+               /* Don't print an error; allow the caller to log a better error. */
+               DBG("Failed to parse string as unsigned long long number: string = '%s', errno = %d",
+                               str, errno);
+               ret = -1;
+               goto end;
+       }
+
+       /* Not the end of the string or empty string. */
+       if (*endptr || endptr == str) {
+               DBG("Failed to parse string as unsigned long long number: string = '%s'",
+                               str);
+               ret = -1;
+               goto end;
+       }
+
+       ret = 0;
+
+end:
+       return ret;
+}