Line data    Source code

       1             : #include "fd_acc_mgr.h"
       2             : #include "../../funk/fd_funk.h"
       3             : 
       4             : fd_account_meta_t const *
       5             : fd_funk_get_acc_meta_readonly( fd_funk_t const *         funk,
       6             :                                fd_funk_txn_xid_t const * xid,
       7             :                                fd_pubkey_t const *       pubkey,
       8          69 :                                fd_funk_txn_xid_t *       out_xid ) {
       9          69 :   fd_funk_rec_key_t id = fd_funk_acc_key( pubkey );
      10             : 
      11             :   /* When we access this pointer later on in the execution pipeline, we assume that
      12             :      nothing else will change that account. If the account is writable in the solana txn,
      13             :      then we copy the data. If the account is read-only, we do not. This is safe because of
      14             :      the read-write locks that the solana transaction holds on the account. */
      15             : 
      16          69 :   for(;;) {
      17             : 
      18             :     /* Locate the account record */
      19             : 
      20          69 :     fd_funk_rec_query_t   query[1];
      21          69 :     fd_funk_rec_t const * rec = fd_funk_rec_query_try_global( funk, xid, &id, out_xid, query );
      22          69 :     if( FD_UNLIKELY( !rec ) )  {
      23           3 :       return NULL;
      24           3 :     }
      25             : 
      26             :     /* Read account balance */
      27             : 
      28          66 :     void const *              raw      = fd_funk_val( rec, fd_funk_wksp( funk ) );
      29          66 :     fd_account_meta_t const * metadata = fd_type_pun_const( raw );
      30          66 :     ulong const               lamports = metadata->lamports;
      31          66 :     if( FD_UNLIKELY( !lamports ) ) {
      32             :       /* This account is awaiting deletion */
      33           0 :       return NULL;
      34           0 :     }
      35             : 
      36             :     /* Recover from overruns (e.g. account rooted) */
      37             : 
      38          66 :     if( FD_LIKELY( fd_funk_rec_map_query_test( query )==FD_MAP_SUCCESS ) ) {
      39          66 :       return metadata;
      40          66 :     }
      41             : 
      42          66 :   }
      43          69 : }