72 lines
1.1 KiB
C
72 lines
1.1 KiB
C
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#include <linux/types.h>
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#include <syscall.h>
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#include "hmm.h"
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int init_hmm(struct hmm *mm, u32 count)
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{
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u32* data;
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if( mm == NULL)
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return -EINVAL;
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data = malloc(count*sizeof(u32*));
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if( data )
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{
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int i;
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for(i = 0; i < count-1; )
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data[i] = ++i;
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data[i] = 0;
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mm->table = data;
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mm->next = 0;
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mm->avail = count;
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mm->count = count;
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return 0;
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};
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return -ENOMEM;
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};
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u32 alloc_handle(struct hmm *mm)
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{
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u32 handle = 0;
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u32 ifl;
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ifl = safe_cli();
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if(mm->avail)
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{
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handle = mm->next;
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mm->next = mm->table[handle];
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mm->avail--;
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handle++;
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}
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safe_sti(ifl);
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return handle;
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};
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int free_handle(struct hmm *mm, u32 handle)
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{
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int ret = -1;
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u32 ifl;
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handle--;
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ifl = safe_cli();
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if(handle < mm->count)
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{
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mm->table[handle] = mm->next;
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mm->next = handle;
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mm->avail++;
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ret = 0;
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};
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safe_sti(ifl);
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return ret;
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};
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