Add SPDX license identifiers to source files under the LGPL

[thirdparty/systemd.git] / src / basic / cpu-set-util.c

diff --git a/src/basic/cpu-set-util.c b/src/basic/cpu-set-util.c
index e2ec4ca83f06e1e9fb69cf65d3437f1f8c41b0ff..271d82d769a8d1730516d3438b757b281adcf56d 100644 (file)
--- a/src/basic/cpu-set-util.c
+++ b/src/basic/cpu-set-util.c
@@ -1,5 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.
 
@@ -20,12 +19,17 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <errno.h>
+#include <stddef.h>
+#include <syslog.h>
+
 #include "alloc-util.h"
 #include "cpu-set-util.h"
 #include "extract-word.h"
+#include "log.h"
+#include "macro.h"
 #include "parse-util.h"
 #include "string-util.h"
-#include "util.h"
 
 cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
         cpu_set_t *c;
@@ -109,3 +113,49 @@ int parse_cpu_set_and_warn(
 
         return (int) ncpus;
 }
+
+int parse_cpu_set(
+                const char *rvalue,
+                cpu_set_t **cpu_set) {
+
+        _cleanup_cpu_free_ cpu_set_t *c = NULL;
+        unsigned ncpus = 0;
+
+        assert(rvalue);
+
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+                unsigned cpu, cpu_lower, cpu_upper;
+                int r;
+
+                r = extract_first_word(&rvalue, &word, WHITESPACE ",", EXTRACT_QUOTES);
+                if (r == -ENOMEM)
+                        return r;
+                if (r <= 0)
+                        break;
+
+                if (!c) {
+                        c = cpu_set_malloc(&ncpus);
+                        if (!c)
+                                return -ENOMEM;
+                }
+
+                r = parse_range(word, &cpu_lower, &cpu_upper);
+                if (r < 0)
+                        return r;
+                if (cpu_lower >= ncpus || cpu_upper >= ncpus)
+                        return -EINVAL;
+
+                if (cpu_lower <= cpu_upper)
+                        for (cpu = cpu_lower; cpu <= cpu_upper; cpu++)
+                                CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
+        }
+
+        /* On success, sets *cpu_set and returns ncpus for the system. */
+        if (c) {
+                *cpu_set = c;
+                c = NULL;
+        }
+
+        return (int) ncpus;
+}