RZ

01: // DemandWrapper.hh # header and signature tables and file handle stuff
02: 
03: #ifndef _DemandWrapper_HH
04: #define _DemandWrapper_HH 1
05: 
06: #include <unistd.h>
07: #include <sys/types.h>
08: #include <sys/wait.h>
09: 
10: #include "RZError.hh"
11: #include "ExtractWrapper.hh"
12: #include "ConReservation.hh"
13: 
14: // ######## ######## ######## ######## ######## ######## ######## ########
15: 
16: namespace RZ {
17:     inline void closer(int const fileno)
18:     {
19:         while (close(fileno) == -1 && errno == EINTR);
20:         IOError::what_if("Can't close!");
21:     }
22: 
23:     struct Piper {
24:         int file_no;
25: 
26:         Piper(int f = -1): file_no(f) {}
27:         void operator=(int f) { file_no = f; }
28:         bool operator!(void) { return file_no == -1; }
29: 
30:         void close()
31:         {
32:             if (file_no != -1) {
33:                 closer(file_no);
34:                 file_no = -1;
35:             }
36:         }
37:     };
38: 
39:     struct Worker: Piper {
40:         int process_id;
41: 
42:         Worker(): process_id(-1) {}
43: 
44:         void close()
45:         {
46:             Piper::close();
47:             if (process_id != -1) {
48:                 int status = 0;
49:                 if (process_id != waitpid(process_id, &status, 0))
50:                     throw AssertionError();
51:                 process_id = -1;
52:             }
53:         }
54:     };
55: 
56:     extern struct FullWrapper rz_wrapper;
57:     extern struct ConTable rz_tab;
58: }
59: 
60: // ######## ######## ######## ######## ######## ######## ######## ########
61: 
62: // DemandWrapper.hh # header and signature tables and file handle stuff
63: 
64: #endif