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9d2f8e22fc
There are cases where we want just to find a thread if it exists already, so provide a method for that. While doing that start moving 'machine' methods to a separate file. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-8wpzqs9kfupng6xq8hx6lnxa@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
#include "machine.h"
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#include "map.h"
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#include "thread.h"
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#include <stdbool.h>
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static struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid,
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bool create)
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{
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struct rb_node **p = &machine->threads.rb_node;
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struct rb_node *parent = NULL;
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struct thread *th;
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/*
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* Font-end cache - PID lookups come in blocks,
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* so most of the time we dont have to look up
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* the full rbtree:
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*/
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if (machine->last_match && machine->last_match->pid == pid)
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return machine->last_match;
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while (*p != NULL) {
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parent = *p;
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th = rb_entry(parent, struct thread, rb_node);
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if (th->pid == pid) {
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machine->last_match = th;
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return th;
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}
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if (pid < th->pid)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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if (!create)
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return NULL;
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th = thread__new(pid);
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if (th != NULL) {
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rb_link_node(&th->rb_node, parent, p);
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rb_insert_color(&th->rb_node, &machine->threads);
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machine->last_match = th;
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}
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return th;
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}
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struct thread *machine__findnew_thread(struct machine *machine, pid_t pid)
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{
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return __machine__findnew_thread(machine, pid, true);
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}
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struct thread *machine__find_thread(struct machine *machine, pid_t pid)
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{
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return __machine__findnew_thread(machine, pid, false);
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}
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