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shm: Keep the ShmPipe alive as long as there are blocks left

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This commit is contained in:
Sjoerd Simons 2011-03-16 18:51:02 +00:00
parent a646afcf88
commit f6efb3e397
1 changed files with 33 additions and 4 deletions
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37
sys/shm/shmpipe.c
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@ -119,6 +119,7 @@ struct _ShmPipe
{
int main_socket;
char *socket_path;
int use_count;
ShmArea *shm_area;
@ -196,6 +197,7 @@ sp_writer_create (const char *path, size_t size, mode_t perms)
memset (self, 0, sizeof (ShmPipe));
self->main_socket = socket (PF_UNIX, SOCK_STREAM, 0);
self->use_count = 1;
if (self->main_socket < 0)
RETURN_ERROR ("Could not create socket (%d): %s\n", errno,
@ -372,6 +374,26 @@ sp_shm_area_dec (ShmPipe * self, ShmArea * area)
}
}
static void
sp_inc (ShmPipe * self)
{
self->use_count++;
}
static void
sp_dec (ShmPipe * self)
{
self->use_count--;
if (self->use_count > 0)
return;
while (self->shm_area)
sp_shm_area_dec (self, self->shm_area);
spalloc_free (ShmPipe, self);
}
void
sp_close (ShmPipe * self)
{
@ -386,10 +408,7 @@ sp_close (ShmPipe * self)
while (self->clients)
sp_writer_close_client (self, self->clients);
while (self->shm_area)
sp_shm_area_dec (self, self->shm_area);
spalloc_free (ShmPipe, self);
sp_dec (self);
}
int
@ -481,6 +500,7 @@ sp_writer_alloc_block (ShmPipe * self, size_t size)
block->pipe = self;
block->area = self->shm_area;
block->ablock = ablock;
sp_inc (self);
return block;
}
@ -491,11 +511,18 @@ sp_writer_block_get_buf (ShmBlock * block)
shm_alloc_space_alloc_block_get_offset (block->ablock);
}
ShmPipe *
sp_writer_block_get_pipe (ShmBlock * block)
{
return block->pipe;
}
void
sp_writer_free_block (ShmBlock * block)
{
shm_alloc_space_block_dec (block->ablock);
sp_shm_area_dec (block->pipe, block->area);
sp_dec (block->pipe);
spalloc_free (ShmBlock, block);
}
@ -709,6 +736,8 @@ sp_client_open (const char *path)
memset (self, 0, sizeof (ShmPipe));
self->main_socket = socket (PF_UNIX, SOCK_STREAM, 0);
self->use_count = 1;
if (self->main_socket < 0)
goto error;