Extend QSharedMemory to work with qsizetype for sizes

This allows larger than 2G memory segments to be allocated.

Fixes: QTBUG-76995
Change-Id: I95309eeea511fadb28724c7592298c2fcc6f1d1a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/corelib/kernel/qsharedmemory_systemv.cpp b/src/corelib/kernel/qsharedmemory_systemv.cpp
index 0ba5f65641..59693951b8 100644
--- a/src/corelib/kernel/qsharedmemory_systemv.cpp
+++ b/src/corelib/kernel/qsharedmemory_systemv.cpp
@@ -132,7 +132,7 @@ bool QSharedMemoryPrivate::cleanHandle()
     return true;
 }
 
-bool QSharedMemoryPrivate::create(int size)
+bool QSharedMemoryPrivate::create(qsizetype size)
 {
     // build file if needed
     bool createdFile = false;
@@ -154,7 +154,7 @@ bool QSharedMemoryPrivate::create(int size)
     }
 
     // create
-    if (-1 == shmget(unix_key, size, 0600 | IPC_CREAT | IPC_EXCL)) {
+    if (-1 == shmget(unix_key, size_t(size), 0600 | IPC_CREAT | IPC_EXCL)) {
         const QLatin1String function("QSharedMemory::create");
         switch (errno) {
         case EINVAL:
@@ -192,7 +192,7 @@ bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
     // grab the size
     shmid_ds shmid_ds;
     if (!shmctl(id, IPC_STAT, &shmid_ds)) {
-        size = (int)shmid_ds.shm_segsz;
+        size = (qsizetype)shmid_ds.shm_segsz;
     } else {
         setErrorString(QLatin1String("QSharedMemory::attach (shmctl)"));
         return false;