comparison: src/buffer.c
src/buffer.c
- changeset 1292
- 1e7ee17777f4
- parent 1291
- 5942859fd76c
equal
deleted
inserted
replaced
| 1291:5942859fd76c | 1292:1e7ee17777f4 |
|---|---|
| 27 */ | 27 */ |
| 28 | 28 |
| 29 #include "cx/buffer.h" | 29 #include "cx/buffer.h" |
| 30 | 30 |
| 31 #include <stdio.h> | 31 #include <stdio.h> |
| 32 #include <unistd.h> | |
| 33 #include <string.h> | 32 #include <string.h> |
| 34 #include <errno.h> | 33 #include <errno.h> |
| 34 | |
| 35 #ifdef _WIN32 | |
| 36 #include <Windows.h> | |
| 37 #include <sysinfoapi.h> | |
| 38 static unsigned long system_page_size() { | |
| 39 static unsigned long ps = 0; | |
| 40 if (ps == 0) { | |
| 41 SYSTEM_INFO sysinfo; | |
| 42 GetSystemInfo(&sysinfo); | |
| 43 ps = sysinfo.dwPageSize; | |
| 44 } | |
| 45 return ps; | |
| 46 } | |
| 47 #define SYSTEM_PAGE_SIZE system_page_size() | |
| 48 #else | |
| 49 #include <unistd.h> | |
| 50 #define SYSTEM_PAGE_SIZE sysconf(_SC_PAGESIZE) | |
| 51 #endif | |
| 35 | 52 |
| 36 static int buffer_copy_on_write(CxBuffer* buffer) { | 53 static int buffer_copy_on_write(CxBuffer* buffer) { |
| 37 if (0 == (buffer->flags & CX_BUFFER_COPY_ON_WRITE)) return 0; | 54 if (0 == (buffer->flags & CX_BUFFER_COPY_ON_WRITE)) return 0; |
| 38 void *newspace = cxMalloc(buffer->allocator, buffer->capacity); | 55 void *newspace = cxMalloc(buffer->allocator, buffer->capacity); |
| 39 if (NULL == newspace) return -1; | 56 if (NULL == newspace) return -1; |
| 189 ) { | 206 ) { |
| 190 if (newcap <= buffer->capacity) { | 207 if (newcap <= buffer->capacity) { |
| 191 return 0; | 208 return 0; |
| 192 } | 209 } |
| 193 | 210 |
| 194 unsigned long pagesize = sysconf(_SC_PAGESIZE); | 211 unsigned long pagesize = SYSTEM_PAGE_SIZE; |
| 195 // if page size is larger than 64 KB - for some reason - truncate to 64 KB | 212 // if page size is larger than 64 KB - for some reason - truncate to 64 KB |
| 196 if (pagesize > 65536) pagesize = 65536; | 213 if (pagesize > 65536) pagesize = 65536; |
| 197 if (newcap < pagesize) { | 214 if (newcap < pagesize) { |
| 198 // when smaller as one page, map to the next power of two | 215 // when smaller as one page, map to the next power of two |
| 199 newcap--; | 216 newcap--; |
