From df2a1c74b8a7123c138ee09f4db51ef6d9d37f42 Mon Sep 17 00:00:00 2001
From: chenkeyu <chenkeyu13@huawei.com>
Date: Mon, 24 Feb 2025 09:50:42 +0800
Subject: [PATCH] add AshmemGetSizeRaw to support larger size

Issue: https://gitee.com/openharmony/commonlibrary_c_utils/issues/IBOA36?from=project-issue
Signed-off-by: chenkeyu <chenkeyu13@huawei.com>
---
 base/include/ashmem.h | 8 ++++++++
 base/src/ashmem.cpp   | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/base/include/ashmem.h b/base/include/ashmem.h
index 78d9304..910212c 100644
--- a/base/include/ashmem.h
+++ b/base/include/ashmem.h
@@ -69,6 +69,14 @@ int AshmemSetProt(int fd, int prot);
  */
 int AshmemGetSize(int fd);
 
+/**
+ * @brief Obtains the size of a specific <b>Ashmem</b> region in the kernel.
+ *
+ * @param fd Indicates the file descriptor of an <b>Ashmem</b> region.
+ * @return Returns the size of the <b>Ashmem</b> region.
+ */
+long AshmemGetSizeRaw(int fd);
+
 /**
  * @brief Provides the <b>Ashmem</b> class implemented in c_utils to
  * operate the Anonymous Shared Memory (Ashmem).
diff --git a/base/src/ashmem.cpp b/base/src/ashmem.cpp
index c65ee8a..5feea32 100644
--- a/base/src/ashmem.cpp
+++ b/base/src/ashmem.cpp
@@ -18,6 +18,7 @@
 #include <fcntl.h>
 #include <pthread.h>
 #include <sys/ioctl.h>
+#include <sys/syscall.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -137,6 +138,11 @@ int AshmemGetSize(int fd)
     return TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_GET_SIZE, NULL));
 }
 
+long AshmemGetSizeRaw(int fd)
+{
+    return TEMP_FAILURE_RETRY(syscall(SYS_ioctl, fd, ASHMEM_GET_SIZE, NULL));
+}
+
 Ashmem::Ashmem(int fd, int32_t size) : memoryFd_(fd), memorySize_(size), flag_(0), startAddr_(nullptr)
 {
 }
-- 
Gitee