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… | |
| 265 | |
265 | |
| 266 | You could override this function in high-availability programs to, say, |
266 | You could override this function in high-availability programs to, say, |
| 267 | free some memory if it cannot allocate memory, to use a special allocator, |
267 | free some memory if it cannot allocate memory, to use a special allocator, |
| 268 | or even to sleep a while and retry until some memory is available. |
268 | or even to sleep a while and retry until some memory is available. |
| 269 | |
269 | |
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270 | Example: The following is the C<realloc> function that libev itself uses |
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271 | which should work with C<realloc> and C<free> functions of all kinds and |
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272 | is probably a good basis for your own implementation. |
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273 | |
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274 | static void * |
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275 | ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT |
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276 | { |
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277 | if (size) |
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278 | return realloc (ptr, size); |
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279 | |
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280 | free (ptr); |
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281 | return 0; |
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282 | } |
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283 | |
| 270 | Example: Replace the libev allocator with one that waits a bit and then |
284 | Example: Replace the libev allocator with one that waits a bit and then |
| 271 | retries (example requires a standards-compliant C<realloc>). |
285 | retries. |
| 272 | |
286 | |
| 273 | static void * |
287 | static void * |
| 274 | persistent_realloc (void *ptr, size_t size) |
288 | persistent_realloc (void *ptr, size_t size) |
| 275 | { |
289 | { |
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290 | if (!size) |
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291 | { |
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292 | free (ptr); |
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293 | return 0; |
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294 | } |
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295 | |
| 276 | for (;;) |
296 | for (;;) |
| 277 | { |
297 | { |
| 278 | void *newptr = realloc (ptr, size); |
298 | void *newptr = realloc (ptr, size); |
| 279 | |
299 | |
| 280 | if (newptr) |
300 | if (newptr) |
