commit 493b3af0ae9eaaa39333239df59aa3b45178c7f1
author Brandon Kim <brandonkim@google.com> Tue Nov 05 16:28:40 2019 -0800
committer Brandon Kim <brandonkim@google.com> Tue Nov 05 17:04:58 2019 -0800
tree 9a3269d7216889554b6e2716983ee51571ad92eb
parent 891c5014a88b43e055cf32221222296793b6b621

internal: Add pread pwrite support in sys

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: I84c5e7f493afbb0894528f5d0986180b7109e170

internal/sys.cpp

diff --git a/internal/sys.cpp b/internal/sys.cpp
index 2e040ae..db843ac 100644
--- a/internal/sys.cpp
+++ b/internal/sys.cpp
@@ -50,6 +50,17 @@
     return static_cast<int>(::read(fd, buf, count));
 }
 
+int SysImpl::pread(int fd, void* buf, std::size_t count, off_t offset) const
+{
+    return static_cast<int>(::pread(fd, buf, count, offset));
+}
+
+int SysImpl::pwrite(int fd, const void* buf, std::size_t count,
+                    off_t offset) const
+{
+    return static_cast<int>(::pwrite(fd, buf, count, offset));
+}
+
 int SysImpl::close(int fd) const
 {
     return ::close(fd);

internal/sys.hpp

diff --git a/internal/sys.hpp b/internal/sys.hpp
index 265d251..41fb46b 100644
--- a/internal/sys.hpp
+++ b/internal/sys.hpp
@@ -28,6 +28,10 @@
 
     virtual int open(const char* pathname, int flags) const = 0;
     virtual int read(int fd, void* buf, std::size_t count) const = 0;
+    virtual int pread(int fd, void* buf, std::size_t count,
+                      off_t offset) const = 0;
+    virtual int pwrite(int fd, const void* buf, std::size_t count,
+                       off_t offset) const = 0;
     virtual int close(int fd) const = 0;
     virtual void* mmap(void* addr, std::size_t length, int prot, int flags,
                        int fd, off_t offset) const = 0;
@@ -48,6 +52,10 @@
   public:
     int open(const char* pathname, int flags) const override;
     int read(int fd, void* buf, std::size_t count) const override;
+    int pread(int fd, void* buf, std::size_t count,
+              off_t offset) const override;
+    int pwrite(int fd, const void* buf, std::size_t count,
+               off_t offset) const override;
     int close(int fd) const override;
     void* mmap(void* addr, std::size_t length, int prot, int flags, int fd,
                off_t offset) const override;

tools/test/internal_sys_mock.hpp

diff --git a/tools/test/internal_sys_mock.hpp b/tools/test/internal_sys_mock.hpp
index 06aa023..ce37d91 100644
--- a/tools/test/internal_sys_mock.hpp
+++ b/tools/test/internal_sys_mock.hpp
@@ -18,6 +18,8 @@
 
     MOCK_CONST_METHOD2(open, int(const char*, int));
     MOCK_CONST_METHOD3(read, int(int, void*, std::size_t));
+    MOCK_CONST_METHOD4(pread, int(int, void*, std::size_t, off_t));
+    MOCK_CONST_METHOD4(pwrite, int(int, const void*, std::size_t, off_t));
     MOCK_CONST_METHOD1(close, int(int));
     MOCK_CONST_METHOD6(mmap, void*(void*, std::size_t, int, int, int, off_t));
     MOCK_CONST_METHOD2(munmap, int(void*, std::size_t));