[Libguestfs] [PATCH v3 1/5] threads: Add a lock (a recursive mutex) to the handle.

Add a g->lock field. This commit simply initializes and destroys the lock on handle creation/free, and does nothing else. --- lib/guestfs-internal.h | 6 ++++++ lib/handle.c | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/lib/guestfs-internal.h b/lib/guestfs-internal.h index ec70336e2..c4a14e962 100644 --- a/lib/guestfs-internal.h +++ b/lib/guestfs-internal.h @@ -53,6 +53,7 @@ #endif #endif +#include "glthread/lock.h" #include "hash.h" #include "guestfs-internal-frontend.h" @@ -389,6 +390,11 @@ struct guestfs_h { struct guestfs_h *next; /* Linked list of open handles. */ enum state state; /* See the state machine diagram in guestfs(3)*/ + /* Lock acquired when entering any public guestfs_* function to + * protect the handle. + */ + gl_recursive_lock_define (, lock); + /**** Configuration of the handle. ****/ bool verbose; /* Debugging. */ bool trace; /* Trace calls. */ diff --git a/lib/handle.c b/lib/handle.c index 91f5f755d..09c29ed84 100644 --- a/lib/handle.c +++ b/lib/handle.c @@ -86,6 +86,8 @@ guestfs_create_flags (unsigned flags, ...) g = calloc (1, sizeof (*g)); if (!g) return NULL; + gl_recursive_lock_init (g->lock); + g->state = CONFIG; g->conn = NULL; @@ -169,6 +171,7 @@ guestfs_create_flags (unsigned flags, ...) free (g->path); free (g->hv); free (g->append); + gl_recursive_lock_destroy (g->lock); free (g); return NULL; } @@ -399,6 +402,7 @@ guestfs_close (guestfs_h *g) free (g->backend_data); guestfs_int_free_string_list (g->backend_settings); free (g->append); + gl_recursive_lock_destroy (g->lock); free (g); } -- 2.13.0