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basic: split out cpu set specific APIs into cpu-set-util.[ch]

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This commit is contained in:
Lennart Poettering
2015-09-30 22:26:16 +02:00
parent 94d75d6423
commit 618234a525
12 changed files with 201 additions and 141 deletions
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src/basic/util.c
-81
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@@ -2551,87 +2551,6 @@ int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
return 0;
}
cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
cpu_set_t *c;
unsigned n = 1024;
/* Allocates the cpuset in the right size */
for (;;) {
c = CPU_ALLOC(n);
if (!c)
return NULL;
if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), c) >= 0) {
CPU_ZERO_S(CPU_ALLOC_SIZE(n), c);
if (ncpus)
*ncpus = n;
return c;
}
CPU_FREE(c);
if (errno != EINVAL)
return NULL;
n *= 2;
}
}
int parse_cpu_set_and_warn(
const char *rvalue,
cpu_set_t **cpu_set,
const char *unit,
const char *filename,
unsigned line,
const char *lvalue) {
const char *whole_rvalue = rvalue;
_cleanup_cpu_free_ cpu_set_t *c = NULL;
unsigned ncpus = 0;
assert(lvalue);
assert(rvalue);
for (;;) {
_cleanup_free_ char *word = NULL;
unsigned cpu;
int r;
r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
return r;
}
if (r == 0)
break;
if (!c) {
c = cpu_set_malloc(&ncpus);
if (!c)
return log_oom();
}
r = safe_atou(word, &cpu);
if (r < 0 || cpu >= ncpus) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse CPU affinity '%s'", rvalue);
return -EINVAL;
}
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;
}
int files_same(const char *filea, const char *fileb) {
struct stat a, b;