| 0,0 → 1,71 |
|---|
| |
| #include <linux/types.h> |
| #include <syscall.h> |
| #include "hmm.h" |
| |
| int init_hmm(struct hmm *mm, u32 count) |
| { |
| u32* data; |
| |
| if( mm == NULL) |
| return -EINVAL; |
| |
| data = malloc(count*sizeof(u32*)); |
| if( data ) |
| { |
| int i; |
| |
| for(i = 0; i < count-1; ) |
| data[i] = ++i; |
| data[i] = 0; |
| |
| mm->table = data; |
| mm->next = 0; |
| mm->avail = count; |
| mm->count = count; |
| |
| return 0; |
| }; |
| return -ENOMEM; |
| }; |
| |
| u32 alloc_handle(struct hmm *mm) |
| { |
| u32 handle = 0; |
| u32 ifl; |
| |
| ifl = safe_cli(); |
| if(mm->avail) |
| { |
| handle = mm->next; |
| mm->next = mm->table[handle]; |
| mm->avail--; |
| handle++; |
| } |
| safe_sti(ifl); |
| |
| return handle; |
| }; |
| |
| int free_handle(struct hmm *mm, u32 handle) |
| { |
| int ret = -1; |
| u32 ifl; |
| |
| handle--; |
| |
| ifl = safe_cli(); |
| if(handle < mm->count) |
| { |
| mm->table[handle] = mm->next; |
| mm->next = handle; |
| mm->avail++; |
| ret = 0; |
| }; |
| safe_sti(ifl); |
| |
| return ret; |
| }; |
| |
| |
| |