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Added a mutex on the swapfile itself to avoid a potential race condition. 

Added a mutex on the swapfile itself to avoid a potential race condition.
--sg
This commit is contained in:
scott 1998-06-29 00:33:16 +00:00
parent faeaa7cc23
commit 2aa993b136
3 changed files with 39 additions and 2 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
Sun Jun 28 19:32:06 1998 Scott Goehring <scott@poverty.bloomington.in.us>
* app/tile_swap.c: Added a mutex on the swapfile to avoid a
potential race condition.
Mon Jun 29 03:14:14 EEST 1998 Lauri Alanko <nether@gimp.org>

18
app/base/tile-swap.c
View File

@ -142,6 +142,10 @@ tile_swap_add (char *filename,
SwapFile *swap_file;
DefSwapFile *def_swap_file;
#ifdef USE_PTHREADS
pthread_mutex_lock(&swapfile_mutex);
#endif
if (initialize)
tile_swap_init ();
@ -167,6 +171,9 @@ tile_swap_add (char *filename,
g_hash_table_insert (swap_files, &swap_file->swap_num, swap_file);
#ifdef USE_PTHREADS
pthread_mutex_unlock(&swapfile_mutex);
#endif
return swap_file->swap_num;
}
@ -175,12 +182,16 @@ tile_swap_remove (int swap_num)
{
SwapFile *swap_file;
#ifdef USE_PTHREADS
pthread_mutex_lock(&swapfile_mutex);
#endif
if (initialize)
tile_swap_init ();
swap_file = g_hash_table_lookup (swap_files, &swap_num);
if (!swap_file)
return;
goto out;
g_hash_table_remove (swap_files, &swap_num);
@ -188,6 +199,10 @@ tile_swap_remove (int swap_num)
close (swap_file->fd);
g_free (swap_file);
out:
#ifdef USE_PTHREADS
pthread_mutex_unlock(&swapfile_mutex);
#endif
}
void
@ -223,6 +238,7 @@ tile_swap_compress (int swap_num)
static void
tile_swap_init ()
{
if (initialize)
{
initialize = FALSE;

18
app/tile_swap.c
View File

@ -142,6 +142,10 @@ tile_swap_add (char *filename,
SwapFile *swap_file;
DefSwapFile *def_swap_file;
#ifdef USE_PTHREADS
pthread_mutex_lock(&swapfile_mutex);
#endif
if (initialize)
tile_swap_init ();
@ -167,6 +171,9 @@ tile_swap_add (char *filename,
g_hash_table_insert (swap_files, &swap_file->swap_num, swap_file);
#ifdef USE_PTHREADS
pthread_mutex_unlock(&swapfile_mutex);
#endif
return swap_file->swap_num;
}
@ -175,12 +182,16 @@ tile_swap_remove (int swap_num)
{
SwapFile *swap_file;
#ifdef USE_PTHREADS
pthread_mutex_lock(&swapfile_mutex);
#endif
if (initialize)
tile_swap_init ();
swap_file = g_hash_table_lookup (swap_files, &swap_num);
if (!swap_file)
return;
goto out;
g_hash_table_remove (swap_files, &swap_num);
@ -188,6 +199,10 @@ tile_swap_remove (int swap_num)
close (swap_file->fd);
g_free (swap_file);
out:
#ifdef USE_PTHREADS
pthread_mutex_unlock(&swapfile_mutex);
#endif
}
void
@ -223,6 +238,7 @@ tile_swap_compress (int swap_num)
static void
tile_swap_init ()
{
if (initialize)
{
initialize = FALSE;