tree 4a843b2614c81ac6b9e1477721800f0261b1fe2e
parent 1aed8b369dd977fba69134fc03bf3762c26c560c
author Steven Moreland <smoreland@google.com> 1572285154 -0700
committer Steven Moreland <smoreland@google.com> 1572302714 -0700

ServiceManager: add isDeclared

Most of the time, AIDL services exist in client/service pairs. In this
context, `while(true) getService` or `waitForService` makes sense.
However, for VINTF services, this client/server coupling isn't
guaranteed. A device may or may not have specific hardware. So, now
IServiceManager can tell a client when a server will exist so it will
know if it needs to wait for this service during boot-up. The function
waitForDeclaredService is provided for this.

These functions are generic (not referring to VINTF specifically)
because they may be expanded to include information about APEX services
in the future OR the infrastructure may be made generic to work, if
desired, on system services.

Bug: 141828236
Test: binderStabilityTest, using waitForDeclaredService function
Change-Id: Ia230625e44e1685cc3fa9230ece8f0a25c88585e