X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d656f9465e7b1c36319f86eeafdcec58fe9551a4..d6cbc9d2e4b8730bcbc9e2812fe08655ab7d5c7d:/src/smpi/internals/smpi_shared.cpp

diff --git a/src/smpi/internals/smpi_shared.cpp b/src/smpi/internals/smpi_shared.cpp
index 9f30550067..9bf2045811 100644
--- a/src/smpi/internals/smpi_shared.cpp
+++ b/src/smpi/internals/smpi_shared.cpp
@@ -149,7 +149,7 @@ static void *smpi_shared_malloc_local(size_t size, const char *file, int line)
   auto res = allocs.insert(std::make_pair(loc, shared_data_t()));
   auto data = res.first;
   if (res.second) {
-    // The insertion did not take place.
+    // The new element was inserted.
     // Generate a shared memory name from the address of the shared_data:
     char shmname[32]; // cannot be longer than PSHMNAMLEN = 31 on Mac OS X (shm_open raises ENAMETOOLONG otherwise)
     snprintf(shmname, 31, "/shmalloc%p", &*data);
@@ -191,8 +191,8 @@ static void *smpi_shared_malloc_local(size_t size, const char *file, int line)
 
 void* smpi_shared_malloc_partial(size_t size, size_t* shared_block_offsets, int nb_shared_blocks)
 {
-  char *huge_page_mount_point = xbt_cfg_get_string("smpi/shared-malloc-hugepage");
-  bool use_huge_page = huge_page_mount_point[0] != '\0';
+  std::string huge_page_mount_point = xbt_cfg_get_string("smpi/shared-malloc-hugepage");
+  bool use_huge_page                = not huge_page_mount_point.empty();
 #ifndef MAP_HUGETLB /* If the system header don't define that mmap flag */
   xbt_assert(not use_huge_page,
              "Huge pages are not available on your system, you cannot use the smpi/shared-malloc-hugepage option.");
@@ -232,11 +232,10 @@ void* smpi_shared_malloc_partial(size_t size, size_t* shared_block_offsets, int
    * We cannot use a same file for the two type of calls, since the first one needs to be
    * opened in a hugetlbfs mount point whereas the second needs to be a "classical" file. */
   if(use_huge_page && smpi_shared_malloc_bogusfile_huge_page == -1) {
-    char* huge_page_filename               = bprintf("%s/simgrid-shmalloc-XXXXXX", huge_page_mount_point);
-    smpi_shared_malloc_bogusfile_huge_page = mkstemp(huge_page_filename);
-    XBT_DEBUG("bogusfile_huge_page: %s\n", huge_page_filename);
-    unlink(huge_page_filename);
-    xbt_free(huge_page_filename);
+    std::string huge_page_filename         = huge_page_mount_point + "/simgrid-shmalloc-XXXXXX";
+    smpi_shared_malloc_bogusfile_huge_page = mkstemp((char*)huge_page_filename.c_str());
+    XBT_DEBUG("bogusfile_huge_page: %s\n", huge_page_filename.c_str());
+    unlink(huge_page_filename.c_str());
   }
   if(smpi_shared_malloc_bogusfile == -1) {
     char name[]                  = "/tmp/simgrid-shmalloc-XXXXXX";
@@ -272,9 +271,9 @@ void* smpi_shared_malloc_partial(size_t size, size_t* shared_block_offsets, int
               "stop_offset (%zu) should be lower than its successor start offset (%zu)", stop_offset, shared_block_offsets[2*i_block+2]);
     size_t start_block_offset = ALIGN_UP(start_offset, smpi_shared_malloc_blocksize);
     size_t stop_block_offset = ALIGN_DOWN(stop_offset, smpi_shared_malloc_blocksize);
-    for (unsigned block_id=0, i = start_block_offset / smpi_shared_malloc_blocksize; i < stop_block_offset / smpi_shared_malloc_blocksize; block_id++, i++) {
-      XBT_DEBUG("\t\tglobal shared allocation, mmap block offset %u", block_id);
-      void* pos = (void*)((unsigned long)mem + i * smpi_shared_malloc_blocksize);
+    for (size_t offset = start_block_offset; offset < stop_block_offset; offset += smpi_shared_malloc_blocksize) {
+      XBT_DEBUG("\t\tglobal shared allocation, mmap block offset %zx", offset);
+      void* pos = (void*)((unsigned long)mem + offset);
       void* res = mmap(pos, smpi_shared_malloc_blocksize, PROT_READ | PROT_WRITE, mmap_flag,
                        huge_fd, 0);
       xbt_assert(res == pos, "Could not map folded virtual memory (%s). Do you perhaps need to increase the "