From 1476c2bc15b8dc3e08b08a48f405ceae66894d0c Mon Sep 17 00:00:00 2001
From: tangchao0503 <735056338@qq.com>
Date: Fri, 14 Jul 2023 16:33:37 +0800
Subject: [PATCH] =?UTF-8?q?=E5=86=85=E5=AD=98=E6=98=A0=E5=B0=84mremap?=
 =?UTF-8?q?=E5=9C=A8320G=E6=97=B6=E4=BC=9A=E5=A4=B1=E8=B4=A5=EF=BC=8C?=
 =?UTF-8?q?=E6=94=B9=E4=B8=BA=E7=94=A8fwrite=EF=BC=8C=E7=BB=8F=E6=B5=8B?=
 =?UTF-8?q?=E8=AF=95980PRO=202=E4=B8=AAbin1=20=E9=87=87=E9=9B=8680?=
 =?UTF-8?q?=E5=88=86=E9=92=9F=E4=B8=8D=E4=BC=9A=E4=B8=A2=E5=B8=A7=EF=BC=9B?=
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---
 Source_Files/ximeaimager.cpp | 81 ++----------------------------------
 1 file changed, 3 insertions(+), 78 deletions(-)

diff --git a/Source_Files/ximeaimager.cpp b/Source_Files/ximeaimager.cpp
index f45f59d..7d2f3ed 100644
--- a/Source_Files/ximeaimager.cpp
+++ b/Source_Files/ximeaimager.cpp
@@ -938,29 +938,9 @@ WriteData2Disk::WriteData2Disk()
 void WriteData2Disk::write2Disk()
 {
     QString imageFileName=m_QbaseFileName+".bil";
-//    FILE *hFile=fopen(imageFileName.toStdString().c_str(),"w+b");
+    FILE *hFile=fopen(imageFileName.toStdString().c_str(),"w+b");
 
 
-    int fd = open(imageFileName.toStdString().c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
-
-    size_t fileSize = m_iFrameSizeInByte*(size_t)100*(size_t)60*(size_t)5;
-    size_t fileSizeIncrement = m_iFrameSizeInByte*(size_t)100*(size_t)60*(size_t)5;
-    if (lseek(fd, fileSize - 1, SEEK_SET) == -1) {
-        std::cerr << "Error calling lseek()\n";
-        return;
-    }
-    if (write(fd, "", 1) == -1) {
-        std::cerr << "Error writing last byte of the file\n";
-        return;
-    }
-    void* addr = mmap(nullptr, fileSize, PROT_WRITE, MAP_SHARED, fd, 0);
-    if (addr == MAP_FAILED) {
-        std::cerr << "Error mmapping the file\n";
-        return;
-    }
-
-    size_t sizeWrited2disk = 0;
-
     int frameCounter = 0;
     int frameNumber;
     unsigned short * dataBuffer = new unsigned short[m_iFrameSizeInByte/2*m_iNumber_WriteDisk];
@@ -1002,71 +982,16 @@ void WriteData2Disk::write2Disk()
 
 
 //        std::cout<<"WriteData2Disk::write2Disk-----------------------正在写磁盘!" << m_pool->max_size() <<std::endl;//
+        fwrite(dataBuffer,1,m_iFrameSizeInByte*frameNumber, hFile);
 
 
-        if (fileSize < sizeWrited2disk + m_iFrameSizeInByte*frameNumber)
-        {
-//            if (munmap(addr, fileSize) == -1) {
-//                std::cerr << "Error un-mmapping the file\n";
-//            }
-
-//            std::cout<<"老fileSize：" << fileSize <<std::endl;
-            size_t new_size = fileSize + fileSizeIncrement;
-            if (ftruncate(fd, new_size) == -1) {
-                std::cerr << "Error calling ftruncate()\n";
-                return;
-            }
-
-            // Remap the file with the new size
-            addr = mremap(addr, fileSize, new_size, MREMAP_MAYMOVE);
-            if (addr == MAP_FAILED) {
-                std::cerr << "Error calling mremap()\n";
-                return;
-            }
-
-            fileSize = new_size;
-//            std::cout<<"新fileSize：" << fileSize <<std::endl;
-
-        }
-//        fwrite(dataBuffer,1,m_iFrameSizeInByte*frameNumber, hFile);
-        memcpy(addr + sizeWrited2disk, dataBuffer, m_iFrameSizeInByte*frameNumber);
-
-        sizeWrited2disk = sizeWrited2disk + m_iFrameSizeInByte*frameNumber;
-//        std::cout<<"sizeWrited2disk：" << sizeWrited2disk <<std::endl;
-
         frameCounter++;
     }
     m_rgbImage->m_VideoWriter.release();
-//    fclose(hFile);
+    fclose(hFile);
     delete[] dataBuffer;
 
 
-
-
-//    if (munmap(addr, fileSize) == -1) {
-//        std::cerr << "Error un-mmapping the file\n";
-//    }
-
-    // Resize the file to 4096 bytes
-    if (ftruncate(fd, sizeWrited2disk) == -1) {
-        std::cerr << "Error calling ftruncate()\n";
-        return;
-    }
-
-    // Remap the file with the new size
-    addr = mremap(addr, fileSize, sizeWrited2disk, MREMAP_MAYMOVE);
-    if (addr == MAP_FAILED) {
-        std::cerr << "Error calling mremap()\n";
-        return;
-    }
-
-    if (munmap(addr, sizeWrited2disk) == -1) {
-        std::cerr << "Error un-mmapping the file\n";
-    }
-
-    close(fd);
-
-
     std::cout<<"WriteData2Disk::write2Disk-----------------------写磁盘线程将退出，内存池可达到的最多元素数：" << m_pool->max_size() <<std::endl;
     std::cout<<"WriteData2Disk::write2Disk-----------------------写磁盘线程将退出，fwrite 调用次数：" << frameCounter <<std::endl;
 }