php/archived-php-src
1
0
Fork 0
mirror of https://github.com/php/php-src.git synced 2026-04-27 01:48:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

Implement memory mapping for win32.

Browse Source 
Could do with some rigorous testing; simple readfile() tests here appear to work.
This commit is contained in:
Wez Furlong
2003-02-28 01:47:28 +00:00
parent 7be8179520
commit cd98ed7b0a
1 changed files with 95 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
main/streams/plain_wrapper.c
+95
View File
@@ -149,6 +149,10 @@ typedef struct {
char *last_mapped_addr;
size_t last_mapped_len;
#endif
#ifdef PHP_WIN32
char *last_mapped_addr;
HANDLE file_mapping;
#endif
} php_stdio_stream_data;
PHPAPI php_stream *_php_stream_fopen_temporary_file(const char *dir, const char *pfx, char **opened_path STREAMS_DC TSRMLS_DC)
@@ -362,6 +366,15 @@ static int php_stdiop_close(php_stream *stream, int close_handle TSRMLS_DC)
munmap(data->last_mapped_addr, data->last_mapped_len);
data->last_mapped_addr = NULL;
}
#elif defined(PHP_WIN32)
if (data->last_mapped_addr) {
UnmapViewOfFile(data->last_mapped_addr);
data->last_mapped_addr = NULL;
}
if (data->file_mapping) {
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
}
#endif
if (close_handle) {
@@ -643,6 +656,88 @@ static int php_stdiop_set_option(php_stream *stream, int option, int value, void
return PHP_STREAM_OPTION_RETURN_ERR;
}
}
#elif defined(PHP_WIN32)
{
php_stream_mmap_range *range = (php_stream_mmap_range*)ptrparam;
HANDLE hfile = (HANDLE)_get_osfhandle(fd);
DWORD prot, acc, loffs = 0, delta = 0;
switch (value) {
case PHP_STREAM_MMAP_SUPPORTED:
return hfile == INVALID_HANDLE_VALUE ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_MMAP_MAP_RANGE:
switch (range->mode) {
case PHP_STREAM_MAP_MODE_READONLY:
prot = PAGE_READONLY;
acc = FILE_MAP_READ;
break;
case PHP_STREAM_MAP_MODE_READWRITE:
prot = PAGE_READWRITE;
acc = FILE_MAP_READ | FILE_MAP_WRITE;
break;
case PHP_STREAM_MAP_MODE_SHARED_READONLY:
prot = PAGE_READONLY;
acc = FILE_MAP_READ;
/* TODO: we should assign a name for the mapping */
break;
case PHP_STREAM_MAP_MODE_SHARED_READWRITE:
prot = PAGE_READWRITE;
acc = FILE_MAP_READ | FILE_MAP_WRITE;
/* TODO: we should assign a name for the mapping */
break;
}
/* create a mapping capable of viewing the whole file (this costs no real resources) */
data->file_mapping = CreateFileMapping(hfile, NULL, prot, 0, 0, NULL);
if (data->file_mapping == NULL) {
return PHP_STREAM_OPTION_RETURN_ERR;
}
if (range->length == 0) {
range->length = GetFileSize(hfile, NULL) - range->offset;
}
/* figure out how big a chunk to map to be able to view the part that we need */
if (range->offset != 0) {
SYSTEM_INFO info;
DWORD gran;
GetSystemInfo(&info);
gran = info.dwAllocationGranularity;
loffs = (range->offset / gran) * gran;
delta = range->offset - loffs;
}
data->last_mapped_addr = MapViewOfFile(data->file_mapping, acc, 0, loffs, range->length);
if (data->last_mapped_addr) {
/* give them back the address of the start offset they requested */
range->mapped = data->last_mapped_addr + delta;
return PHP_STREAM_OPTION_RETURN_OK;
}
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_ERR;
case PHP_STREAM_MMAP_UNMAP:
if (data->last_mapped_addr) {
UnmapViewOfFile(data->last_mapped_addr);
data->last_mapped_addr = NULL;
CloseHandle(data->file_mapping);
data->file_mapping = NULL;
return PHP_STREAM_OPTION_RETURN_OK;
}
return PHP_STREAM_OPTION_RETURN_ERR;
default:
return PHP_STREAM_OPTION_RETURN_ERR;
}
}
#endif
return PHP_STREAM_OPTION_RETURN_NOTIMPL;