include/qemu/thread-context.h

   1 /*
   2  * QEMU Thread Context
   3  *
   4  * Copyright Red Hat Inc., 2022
   5  *
   6  * Authors:
   7  *  David Hildenbrand <david@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #ifndef SYSEMU_THREAD_CONTEXT_H
  14 #define SYSEMU_THREAD_CONTEXT_H
  15
  16 #include "qapi/qapi-types-machine.h"
  17 #include "qemu/thread.h"
  18 #include "qom/object.h"
  19
  20 #define TYPE_THREAD_CONTEXT "thread-context"
  21 OBJECT_DECLARE_TYPE(ThreadContext, ThreadContextClass,
  22                     THREAD_CONTEXT)
  23
  24 struct ThreadContextClass {
  25     ObjectClass parent_class;
  26 };
  27
  28 struct ThreadContext {
  29     /* private */
  30     Object parent;
  31
  32     /* private */
  33     unsigned int thread_id;
  34     QemuThread thread;
  35
  36     /* Semaphore to wait for context thread action. */
  37     QemuSemaphore sem;
  38     /* Semaphore to wait for action in context thread. */
  39     QemuSemaphore sem_thread;
  40     /* Mutex to synchronize requests. */
  41     QemuMutex mutex;
  42
  43     /* Commands for the thread to execute. */
  44     int thread_cmd;
  45     void *thread_cmd_data;
  46
  47     /* CPU affinity bitmap used for initialization. */
  48     unsigned long *init_cpu_bitmap;
  49     int init_cpu_nbits;
  50 };
  51
  52 void thread_context_create_thread(ThreadContext *tc, QemuThread *thread,
  53                                   const char *name,
  54                                   void *(*start_routine)(void *), void *arg,
  55                                   int mode);
  56
  57 #endif /* SYSEMU_THREAD_CONTEXT_H */