#include "comm.h" #include "util.h" #include #include #include struct comm_str { char *str; struct rb_node rb_node; atomic_t refcnt; }; /* Should perhaps be moved to struct machine */ static struct rb_root comm_str_root; static struct comm_str *comm_str__get(struct comm_str *cs) { if (cs) atomic_inc(&cs->refcnt); return cs; } static void comm_str__put(struct comm_str *cs) { if (cs && atomic_dec_and_test(&cs->refcnt)) { rb_erase(&cs->rb_node, &comm_str_root); zfree(&cs->str); free(cs); } } static struct comm_str *comm_str__alloc(const char *str) { struct comm_str *cs; cs = zalloc(sizeof(*cs)); if (!cs) return NULL; cs->str = strdup(str); if (!cs->str) { free(cs); return NULL; } atomic_set(&cs->refcnt, 0); return cs; } static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root) { struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; struct comm_str *iter, *new; int cmp; while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct comm_str, rb_node); cmp = strcmp(str, iter->str); if (!cmp) return iter; if (cmp < 0) p = &(*p)->rb_left; else p = &(*p)->rb_right; } new = comm_str__alloc(str); if (!new) return NULL; rb_link_node(&new->rb_node, parent, p); rb_insert_color(&new->rb_node, root); return new; } struct comm *comm__new(const char *str, u64 timestamp, bool exec) { struct comm *comm = zalloc(sizeof(*comm)); if (!comm) return NULL; comm->start = timestamp; comm->exec = exec; comm->comm_str = comm_str__findnew(str, &comm_str_root); if (!comm->comm_str) { free(comm); return NULL; } comm_str__get(comm->comm_str); return comm; } int comm__override(struct comm *comm, const char *str, u64 timestamp, bool exec) { struct comm_str *new, *old = comm->comm_str; new = comm_str__findnew(str, &comm_str_root); if (!new) return -ENOMEM; comm_str__get(new); comm_str__put(old); comm->comm_str = new; comm->start = timestamp; if (exec) comm->exec = true; return 0; } void comm__free(struct comm *comm) { comm_str__put(comm->comm_str); free(comm); } const char *comm__str(const struct comm *comm) { return comm->comm_str->str; } nux/net-next.git/log/net/6lowpan/nhc_udp.c'>
path: root/net/6lowpan/nhc_udp.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-25 14:30:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-25 14:30:04 -0800
commit3ddc76dfc786cc6f87852693227fb0b1f124f807 (patch)
tree8192b4721e05cf6823087f9696db8c0c8f144b02 /net/6lowpan/nhc_udp.c
parentb272f732f888d4cf43c943a40c9aaa836f9b7431 (diff)
parent1f3a8e49d8f28f498b8694464623ac20aebfe62a (diff)
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer type cleanups from Thomas Gleixner: "This series does a tree wide cleanup of types related to timers/timekeeping. - Get rid of cycles_t and use a plain u64. The type is not really helpful and caused more confusion than clarity - Get rid of the ktime union. The union has become useless as we use the scalar nanoseconds storage unconditionally now. The 32bit timespec alike storage got removed due to the Y2038 limitations some time ago. That leaves the odd union access around for no reason. Clean it up. Both changes have been done with coccinelle and a small amount of manual mopping up" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ktime: Get rid of ktime_equal() ktime: Cleanup ktime_set() usage ktime: Get rid of the union clocksource: Use a plain u64 instead of cycle_t
Diffstat (limited to 'net/6lowpan/nhc_udp.c')