my_nojemalloc.cc

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#ifdef _WIN32
/* In order to use jemalloc in the mysys library, the use_jemalloc_allocations
function must return true.

This definition of the function (in the mysys library) returns false, so by
default, the mysys library will not use jemalloc for memory allocation.

Note that the linker always uses a symbol defined in an .obj file in preference
to the same symbol defined in a lib. Thus a user of the mysys library who wants
the mysys library to use jemalloc must provide an overriding definition (i.e.
link with an obj file definition) of the use_jemalloc_allocations function that
returns true.
*/
extern "C" bool use_jemalloc_allocations() { return false; }
#endif