diff options
Diffstat (limited to 'plpa-1.3.2/src/libplpa/plpa_dispatch.c')
| -rw-r--r-- | plpa-1.3.2/src/libplpa/plpa_dispatch.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/plpa-1.3.2/src/libplpa/plpa_dispatch.c b/plpa-1.3.2/src/libplpa/plpa_dispatch.c deleted file mode 100644 index 13dc8208..00000000 --- a/plpa-1.3.2/src/libplpa/plpa_dispatch.c +++ /dev/null @@ -1,193 +0,0 @@ -/* -*- c -*- - * - * Copyright (c) 2004-2006 The Trustees of Indiana University. - * All rights reserved. - * Copyright (c) 2004-2005 The Regents of the University of California. - * All rights reserved. - * Copyright (c) 2007-2008 Cisco Systems, Inc. All rights reserved. - * $COPYRIGHT$ - * - * Additional copyrights may follow - * - * $HEADER$ - */ - -#include "plpa_config.h" -#include "plpa.h" -#include "plpa_internal.h" - -#include <errno.h> -#include <sys/syscall.h> -#include <unistd.h> - -/** - * Call the kernel's setaffinity, massaging the user's input - * parameters as necessary - */ -int PLPA_NAME(sched_setaffinity)(pid_t pid, size_t cpusetsize, - const PLPA_NAME(cpu_set_t) *cpuset) -{ - int ret; - size_t i; - PLPA_NAME(cpu_set_t) tmp; - PLPA_NAME(api_type_t) api; - - /* Check to see that we're initialized */ - if (!PLPA_NAME(initialized)) { - if (0 != (ret = PLPA_NAME(init)())) { - return ret; - } - } - - /* Check for bozo arguments */ - if (NULL == cpuset) { - return EINVAL; - } - - /* Probe the API type */ - if (0 != (ret = PLPA_NAME(api_probe)(&api))) { - return ret; - } - switch (api) { - case PLPA_NAME_CAPS(PROBE_OK): - /* This shouldn't happen, but check anyway */ - if (cpusetsize > sizeof(*cpuset)) { - return EINVAL; - } - - /* If the user-supplied bitmask is smaller than what the - kernel wants, zero out a temporary buffer of the size that - the kernel wants and copy the user-supplied bitmask to the - lower part of the temporary buffer. This could be done - more efficiently, but we're looking for clarity/simplicity - of code here -- this is not intended to be - performance-critical. */ - if (cpusetsize < PLPA_NAME(len)) { - memset(&tmp, 0, sizeof(tmp)); - for (i = 0; i < cpusetsize * 8; ++i) { - if (PLPA_CPU_ISSET(i, cpuset)) { - PLPA_CPU_SET(i, &tmp); - } - } - } - - /* If the user-supplied bitmask is larger than what the kernel - will accept, scan it and see if there are any set bits in - the part larger than what the kernel will accept. If so, - return EINVAL. Otherwise, copy the part that the kernel - will accept into a temporary and use that. Again, - efficinency is not the issue of this code -- clarity is. */ - else if (cpusetsize > PLPA_NAME(len)) { - for (i = PLPA_NAME(len) * 8; i < cpusetsize * 8; ++i) { - if (PLPA_CPU_ISSET(i, cpuset)) { - return EINVAL; - } - } - /* No upper-level bits are set, so now copy over the bits - that the kernel will look at */ - memset(&tmp, 0, sizeof(tmp)); - for (i = 0; i < PLPA_NAME(len) * 8; ++i) { - if (PLPA_CPU_ISSET(i, cpuset)) { - PLPA_CPU_SET(i, &tmp); - } - } - } - - /* Otherwise, the user supplied a buffer that is exactly the - right size. Just for clarity of code, copy the user's - buffer into the temporary and use that. */ - else { - memcpy(&tmp, cpuset, cpusetsize); - } - - /* Now do the syscall */ - ret = syscall(__NR_sched_setaffinity, pid, PLPA_NAME(len), &tmp); - - /* Return 0 upon success. According to - http://www.open-mpi.org/community/lists/plpa-users/2006/02/0016.php, - all the kernel implementations return >= 0 upon success. */ - return (ret >= 0) ? 0 : ret; - break; - - case PLPA_NAME_CAPS(PROBE_NOT_SUPPORTED): - /* Process affinity not supported here */ - return ENOSYS; - break; - - default: - /* Something went wrong */ - /* JMS: would be good to have something other than EINVAL here - -- suggestions? */ - return EINVAL; - break; - } -} - - -/** - * Call the kernel's getaffinity, massaging the user's input - * parameters as necessary - */ -int PLPA_NAME(sched_getaffinity)(pid_t pid, size_t cpusetsize, - PLPA_NAME(cpu_set_t) *cpuset) -{ - int ret; - PLPA_NAME(api_type_t) api; - - /* Check to see that we're initialized */ - if (!PLPA_NAME(initialized)) { - if (0 != (ret = PLPA_NAME(init)())) { - return ret; - } - } - - /* Check for bozo arguments */ - if (NULL == cpuset) { - return EINVAL; - } - /* Probe the API type */ - if (0 != (ret = PLPA_NAME(api_probe)(&api))) { - return ret; - } - switch (api) { - case PLPA_NAME_CAPS(PROBE_OK): - /* This shouldn't happen, but check anyway */ - if (PLPA_NAME(len) > sizeof(*cpuset)) { - return EINVAL; - } - - /* If the user supplied a buffer that is too small, then don't - even bother */ - if (cpusetsize < PLPA_NAME(len)) { - return EINVAL; - } - - /* Now we know that the user's buffer is >= the size required - by the kernel. If it's >, then zero it out so that the - bits at the top are cleared (since they won't be set by the - kernel) */ - if (cpusetsize > PLPA_NAME(len)) { - memset(cpuset, 0, cpusetsize); - } - - /* Now do the syscall */ - ret = syscall(__NR_sched_getaffinity, pid, PLPA_NAME(len), cpuset); - - /* Return 0 upon success. According to - http://www.open-mpi.org/community/lists/plpa-users/2006/02/0016.php, - all the kernel implementations return >= 0 upon success. */ - return (ret >= 0) ? 0 : ret; - break; - - case PLPA_NAME_CAPS(PROBE_NOT_SUPPORTED): - /* Process affinity not supported here */ - return ENOSYS; - break; - - default: - /* Something went wrong */ - return EINVAL; - break; - } -} - |