[Libguestfs] [PATCH 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. --- src/guestfs-internal.h | 6 ++++++ src/handle.c | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/src/guestfs-internal.h b/src/guestfs-internal.h index bbd7fb4..b68942f 100644 --- a/src/guestfs-internal.h +++ b/src/guestfs-internal.h @@ -33,6 +33,7 @@ #include <libvirt/libvirt.h> #endif +#include "glthread/lock.h" #include "hash.h" #include "guestfs-internal-frontend.h" @@ -365,6 +366,11 @@ 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 + * protects the handle. + */ + gl_recursive_lock_define (, lock); + /**** Configuration of the handle. ****/ bool verbose; /* Debugging. */ bool trace; /* Trace calls. */ diff --git a/src/handle.c b/src/handle.c index 51b9572..a057475 100644 --- a/src/handle.c +++ b/src/handle.c @@ -84,6 +84,8 @@ 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; @@ -167,6 +169,7 @@ guestfs_create_flags (unsigned flags, ...) free (g->path); free (g->hv); free (g->append); + gl_recursive_lock_destroy (g->lock); free (g); return NULL; } @@ -389,6 +392,7 @@ 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); } -- 2.3.1