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Made changes to have shared tcb parts in fs0 in preparation for clone()

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fs_data and files structures can now be shared in the vfs task.
Currently no means to free shared structures in tcb destruction. Need to add that.
This commit is contained in:
Bahadir Balban
2008-11-09 10:07:24 +02:00
parent 5468c1833d
commit 63fb907cd0
13 changed files with 189 additions and 78 deletions
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13
tasks/fs0/src/lib/bit.c
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@@ -96,3 +96,16 @@ int check_and_clear_contig_bits(u32 *word, int first, int nbits)
return 0;
}
int check_and_set_bit(u32 *word, int bit)
{
/* Check that bit was clear */
if (!(word[BITWISE_GETWORD(bit)] & BITWISE_GETBIT(bit))) {
word[BITWISE_GETWORD(bit)] |= BITWISE_GETBIT(bit);
return 0;
} else {
//printf("Trying to set already set bit\n");
return -1;
}
}

16
tasks/fs0/src/lib/idpool.c
View File

@@ -9,12 +9,15 @@
#include <l4/macros.h>
#include INC_GLUE(memory.h)
#include <stdio.h>
#include <l4/api/errno.h>
struct id_pool *id_pool_new_init(int totalbits)
{
int nwords = BITWISE_GETWORD(totalbits);
struct id_pool *new = kzalloc((nwords * SZ_WORD)
+ sizeof(struct id_pool));
if (!new)
return PTR_ERR(-ENOMEM);
new->nwords = nwords;
return new;
}
@@ -63,3 +66,16 @@ int id_del(struct id_pool *pool, int id)
return ret;
}
/* Return a specific id, if available */
int id_get(struct id_pool *pool, int id)
{
int ret;
ret = check_and_set_bit(pool->bitmap, id);
if (ret < 0)
return ret;
else
return id;
}