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SHM_INFO and SHM_STAT

Subject: SHM_INFO and SHM_STAT
From: Christof Rath <email@hidden>
Date: Mon, 31 Mar 2008 20:23:37 +0200
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Hey there, I try to compile a robot framework that is written for Linux. My problem is, that it uses shmctl() commands that aren't defined in shm.h (like on linux systems).

The four commands in use: SHM_INFO, SHM_STAT, SHM_LOCK and SHM_UNLOCK

a code fragment:

[...]
  struct shmid_ds shm_info;
  max_id = shmctl( 0, SHM_INFO, &shm_info );

  if (max_id >= 0) {
    for ( int i = 0; (_memptr == NULL) && (i <= max_id); ++i ) {

      shm_id = shmctl( i, SHM_STAT, &shm_segment );
      if ( shm_id < 0 )  continue;
[...]


or:
[...]
  if (swapable) {
    shmctl(__shared_mem_id, SHM_UNLOCK, NULL);
  } else {
    shmctl(__shared_mem_id, SHM_LOCK, NULL);
  }
[...]

is there a workaround? Can anybody tell me how to access this information?

Best wishes,
Christof
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