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Modules doc: hint about replacing libc malloc calls.

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antirez 2016-06-22 15:24:51 +02:00
parent 0b4b7ebd95
commit 4e10b08fb3
1 changed files with 14 additions and 0 deletions
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src/modules/TYPES.md
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@ -354,4 +354,18 @@ allocation functions provided by the module API is exactly compatible with
`malloc()`, `realloc()`, `free()` and `strdup()`, so converting the libraries `malloc()`, `realloc()`, `free()` and `strdup()`, so converting the libraries
in order to use these functions should be trivial. in order to use these functions should be trivial.
In case you have an external library that uses libc `malloc()`, and you want
to avoid replacing manually all the calls with the Redis Modules API calls,
an approach could be to use simple macros in order to replace the libc calls
with the Redis API calls. Something like this could work:
#define malloc RedisModule_Alloc
#define realloc RedisModule_Realloc
#define free RedisModule_Free
#define strdup RedisModule_Strdup
However take in mind that mixing libc calls with Redis API calls will result
into troubles and crashes, so if you replace calls using macros, you need to
make sure that all the calls are correctly replaced, and that the code with
the substituted calls will never, for example, attempt to call
`RedisModule_Free()` with a pointer allocated using libc `malloc()`.