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[GNUnet-SVN] r25317 - gnunet/src/testbed
From: |
gnunet |
Subject: |
[GNUnet-SVN] r25317 - gnunet/src/testbed |
Date: |
Fri, 7 Dec 2012 18:57:48 +0100 |
Author: harsha
Date: 2012-12-07 18:57:48 +0100 (Fri, 07 Dec 2012)
New Revision: 25317
Modified:
gnunet/src/testbed/gnunet_mpi_test.c
Log:
- fork within MPI
Modified: gnunet/src/testbed/gnunet_mpi_test.c
===================================================================
--- gnunet/src/testbed/gnunet_mpi_test.c 2012-12-07 16:37:37 UTC (rev
25316)
+++ gnunet/src/testbed/gnunet_mpi_test.c 2012-12-07 17:57:48 UTC (rev
25317)
@@ -2,11 +2,18 @@
#include "gnunet_util_lib.h"
#include <mpi.h>
+/**
+ * Generic logging shorthand
+ */
+#define LOG(kind,...) \
+ GNUNET_log_from (kind, "gnunet-mpi-test", __VA_ARGS__)
+
int main (int argc, char *argv[])
{
char *msg;
char *filename;
pid_t pid;
+ pid_t ppid;
int ntasks;
int rank;
int msg_size;
@@ -19,8 +26,10 @@
goto finalize;
if (MPI_SUCCESS != MPI_Comm_rank (MPI_COMM_WORLD, &rank))
goto finalize;
- (void) GNUNET_asprintf (&filename, "%d.mpiout", rank);
+ pid = getpid();
+ (void) GNUNET_asprintf (&filename, "%d-%d.mpiout", (int) pid, rank);
msg_size = GNUNET_asprintf (&msg, "My rank is: %d\n", rank);
+ printf ("%s", msg);
if (msg_size == GNUNET_DISK_fn_write (filename,
msg, msg_size,
GNUNET_DISK_PERM_USER_READ
@@ -30,6 +39,57 @@
ret = GNUNET_OK;
GNUNET_free (filename);
GNUNET_free (msg);
+ if (GNUNET_OK != ret)
+ goto finalize;
+
+ ret = GNUNET_SYSERR;
+ ppid = pid;
+ pid = fork ();
+ if (-1 == pid)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
+ goto finalize;
+ }
+ if (0 == pid)
+ {
+ /* child code */
+ pid = getpid ();
+ (void) GNUNET_asprintf (&filename, "%d-%d.mpiout", (int) pid, rank);
+ msg_size = GNUNET_asprintf (&msg, "Child of %d\n", (int) ppid);
+ printf ("%s", msg);
+ if (msg_size == GNUNET_DISK_fn_write (filename,
+ msg, msg_size,
+ GNUNET_DISK_PERM_USER_READ
+ | GNUNET_DISK_PERM_GROUP_READ
+ | GNUNET_DISK_PERM_USER_WRITE
+ | GNUNET_DISK_PERM_GROUP_WRITE))
+ ret = GNUNET_OK;
+ GNUNET_free (filename);
+ GNUNET_free (msg);
+ return (GNUNET_OK == ret) ? 0 : 1;
+ }
+ else {
+ int status;
+ int childpid;
+
+ childpid = waitpid (pid, &status, 0);
+ if (childpid != pid)
+ {
+ GNUNET_break (0);
+ goto finalize;
+ }
+ if (!WIFEXITED (status))
+ {
+ GNUNET_break (0);
+ goto finalize;
+ }
+ if (0 != WEXITSTATUS (status))
+ {
+ GNUNET_break (0);
+ }
+ }
+ ret = GNUNET_OK;
+
finalize:
(void) MPI_Finalize ();
return (GNUNET_OK == ret) ? 0 : 1;
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